Temat: Diagnostics - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Performance monitoring and diagnostics of drive units of heavy armoured equipment
Autorzy:: Piątek, M.
Powiązania:: https://bibliotekanauki.pl/articles/244477.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: diagnostics
engine diagnostics
monitoring
combustion engine
Opis:: Transform the way of visual indication of vehicle traction parameters and the introduction of instinctive, concentrated in one place on-board device service is now possible following the development of microprocessor systems. Centralize system for diagnosis and control of the vehicle in a single desktop, such as the one described here, brings except cost savings also facilitation in addition to the driver and service. Indicators of vehicle speed, engine rpm and other parameters of traction, and the rates and indication of operation states used for additional equipment during the performance of the activities are concentrated in one place. Controls elements, such as circuit breakers, switches and buttons are placed within the areas of appropriate comfort are grouped into blocks that are functionally similar, which further facilitates their location and service. The modern, multi-track switches allow additional control versatility, while reducing their volume, which facilitates access to each of them. Panel equipped with universal input and output circuits and system software provides the flexibility to work with the latest generation of sensors and actuators, and components used previously as well. This allows the design of modern devices and simple upgrading of vehicles already in service.
Źródło:: Journal of KONES; 2011, 18, 1; 443-446
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Application of vibration signals in the diagnosis of combustion engines - exploitation practices
Autorzy:: Stanik, Z.
Warczek, J.
Powiązania:: https://bibliotekanauki.pl/articles/245993.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: vibration diagnostics
combustion engine
Opis:: Changes in operating properties of the internal combustion engine, for various reasons, may manifest themselves with similar symptoms. An example is the drop in engine power, which may be caused by malfunctioning of the system such as power supply, or excessive wear geometric kinematic pairs as the piston-crankshaft. Identification of the causes of malfunction is the basis for carrying out corrective action. In practice, the workshop frequent disability are different manifestations of the drive units having identical symptoms. An alternative to iterative repair methods is the introduction of diagnostic tools that will help identify causes of failure, without having to remove the individual motor units. These provisions comply with the method of vibration analysis. The vibration signals provide information about the technical condition of the object. The paper presents examples of applying the methods of vibration in the identification of changes in the technical condition of the engine, which confirm their usefulness in identifying sources of failure. During the process of investigations, time courses of vibration accelerations were recorded with piezoelectric transducer mounted at half height of the first cylinder, perpendicular to its axis. The worked out method is based on vibration signals recorded at engine operation. The dominant amplitude components of time courses are strongly connected with air- fuel mixture ignition as well as with kinetic pairs of the engine.
Źródło:: Journal of KONES; 2011, 18, 3; 405-412
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Evaluation of the technical condition of the powerpack for AMV Rosomak on the dynamometer test stand
Autorzy:: Karczewski, M.
Szczęch, L.
Walentynowicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/245173.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engine
diagnostics
powerpack
Opis:: The paper describes standard methods of diagnosing of the AMV (the Rosomak) drive unit technical condition used in daily operation in military missions in Afghanistan. Main rule of the method of diagnosing of the vehicle technical condition is using an external diagnosing system. This system is connected to the vehicle at the time of checking of operation of the powertrain control system configuration of the drive unit to permit the diagnosis, including examination of the engine and gearbox. Enhanced diagnostic system is connected to the OBD system with using standard PC computer with appropriate software. Stored examples of the results of the operation of such system are included in the paper. Measuring was led on a dynamometer stand to perform research of a propulsion unit in work condition. Measurements of the engine parameters were led in steady state and transient engine operating conditions. Unsteady-state condition studies were carried out using the method of free-range acceleration of the engine. Pointed out the merits of the development of this type of study due to the perceived potential and usefulness of the results obtained. The results of studies carried out by various methods and assess the current condition of the engine and the entire powertrain were compared.
Źródło:: Journal of KONES; 2013, 20, 3; 221-228
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Diagnostics and analysis of jet engine malfunctions
Autorzy:: Rojewski, A.
Bartoszewicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/242847.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: jet engine
aircraft
diagnostics
safety
Opis:: The article describes emergency situations occurring in the propulsion system of an aircraft with the jet engine used in Poland on planes such as MiG-29 or F-16. The article also presents statistics of polish aircrafts damage over the years. Due to the technological progress of turbine engines used in fighter aircraft, the authors decided to discuss the issue of monitoring emergency states in this study. In particular, efforts have been made to ensure that damage to the aircraft engine can be prevented by monitoring its operation with the equipment available on the aircraft. Counteracting phenomena that occur in the jet engine can lead to permanent damage; can lead to an increase in the safety of the pilot and the local population, but also to a reduction of costs. The authors also decided to se the threats that occur during take-off and landing, and the flight when they land outside the plane. Jet engines are almost reliable and most common cause of engine damages as the analysis shows are foreign bodies, particularly dangerous for a turbine engine on or near the runway, as well as birds, which provides to mechanical damage of engine. Securing the airport against foreign objects on the runway is one of the most important tasks of ground staff.
Źródło:: Journal of KONES; 2018, 25, 2; 313-318
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Non-destructive evaluation of rescue and patrol unmanned aerial vehicle
Autorzy:: Pawluczy-Majka, J.
Powiązania:: https://bibliotekanauki.pl/articles/243854.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: UAV
NDT diagnostics
active thermography
Opis:: With the growing intensity of civil usage of the UAV, one of the most important problems is safety. It consists of operational safe use of the UAV in the common air area and reliability of the aerial vehicle construction. Each flying object is subjected to external loads, which influence on it in flight and on the ground. The external loads are mainly caused by aerodynamic, weight and inertia influence, ground reaction force and the power unit [1]. That is why during service, UAV structures are prone to many mechanical and environmental conditions that can damage to composite structures in the form of delamination, fiber breakage, and matrix cracking. Monitoring the level and type of damage to a composite structure is vital to determining the component’s structural integrity and preventing the failure of the structure during flight [2]. Non-destructive testing which has been used so far to identify defects in the aircraft structure made from metallic materials has a quite limited application in the case of composite structures. With the growing use of composites in the aviation industry, a necessity appears to work out a method allowing identification of technological defects and damages appeared in the process of the UAV’s operation. The answer to the appearing demand could be, for instance, the active thermography technique used for the thin wall test of the skin elements of the UAV. The obtained research results bring closer the problem of selection of the quick, well-fitted non-destructive testing method depending on the kind of the diagnosed construction.
Źródło:: Journal of KONES; 2014, 21, 4; 411-416
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Vibro-acoustic methods in marine diesel engines diagnostics
Autorzy:: Lus, T.
Powiązania:: https://bibliotekanauki.pl/articles/245521.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine diesel engine
turbocharger
diagnostics
vibration
Opis:: Vibro-acoustic diagnostic methods which are used on marine high-speed diesel engines with turbochargers are presented in this paper. Vibration and acoustic signals generated by turbochargers need different signal processing methods to be effective and faultless in turbochargers diagnostics. Diagnostic methods which based on vibration and acoustic signals analysis are sensitive on engine load and speed changes. Methods presented in this paper based on vibration and acoustic signals processing in time and frequency domain. Using this methods checking technical condition of the turbochargers and its rotors and bearings without stopping the engine and dismantling it is possible. Examples of radial-flow rotor turbine overgrown by carbon soot and axial-flow rotor turbine without turbine blades, sound intensity level of turbocharger and acoustic spectrum of turbocharger in octave mode acoustic spectrum of turbocharger in octave mode for two different technical conditions, acoustic and vibration signal spectrum of the turbocharger, vibration acceleration amplitude of first harmonic for three turbochargers, values of harmonic vibrations of accelerations equivalent of turbine blades number, amplitude of vibrations accelerations in frequency domain for turbocharger in good and bad technical conditions are presented in the paper.
Źródło:: Journal of KONES; 2011, 18, 3; 203-210
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Marine diesel engine valve gear mechanism diagnostics problems
Autorzy:: Lus, T.
Powiązania:: https://bibliotekanauki.pl/articles/245681.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine diesel engine
diagnostics
valve gear
Opis:: Marine diesel engines have changed their construction last years because of electronic control implementation in fuelling process. Electronic control implementation could be also important in valve gear mechanism which is main part of the engine gas es exchange system. In this paper problems connected with of valve gear mechanisms operation and diagnostics have been presented. the diagnostic methods and processes which could impact diagnostic process will be shown together with examples from test bed and real vessels. diagnostic methods which based on vibration signals analysis are sensitive on engine load and speed change. separate engine cylinder 's loads generale differences in so called "dynamic valve gear diagrams " which will be shown for some marine engine types. opening and closing of inlet and exhaust valves generale vibration signals in entire engine structure. There are some tools available in signal analysis which gives opportunity to trace changes in signal patterns in real time monitoring systems. special diagnostic method based on vibration signal analysis worked out in the polish naval academy, gives opportunity to change engine maintenance philosophy from scheduled planed maintenance system to condition based maintenance system without fear about real operating engine conditions.
Źródło:: Journal of KONES; 2009, 16, 4; 287-292
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: Examination of changes in the microstructure of gas turbine blades with visual and thermographic methods
Autorzy:: Błachnio, J.
Kułaszka, A.
Kornas, Ł.
Chalimoniuk, M.
Powiązania:: https://bibliotekanauki.pl/articles/247030.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: gas turbine
vane
diagnostics
thermographic method
Opis:: The processes associated with operation of turbinę avionic engines entail the occurrence of various defects affecting turbine components, in particular turbine vanes. The main reasons for defects and deterioration of gas turbine vanes include thermal fatigue and overheating of the vane material. This paper outlines the non-destructive test methods that are currently in use and that are based on an analysis of surface images obtained from the examined parts within the visible bandwidth with the use of a ring-wedge detector. Particular attention is paid to opportunities that enable unbiased diagnostics of changes in the microscopic structure of vanes with the use of the non-destructive thermographic method. Initial examinations ofthe gas turbine vanes, both new ones and those already in operation, have demonstrated the existence of interrelations and dependency between the thermal strain during the turbine operation, changes of signals associated with the thermal response from the material and the condition of the vane microstructures. The results of these examinations have been successfully verified with the use of the metallographic method. The demonstrated interrelations and dependency shall serve as a basis to develop fundamentals for a non-destructive thermographic test method intended to assess the overheating condition of the material for gas turbine vanes.
Źródło:: Journal of KONES; 2010, 17, 2; 27-34
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Possibilities of analysis of condition and repair of common-rail system injectors
Autorzy:: Karpiuk, W.
Bor, M.
Smolec, R.
Powiązania:: https://bibliotekanauki.pl/articles/241530.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: common-rail
diagnostics
testing tables
injectors
Opis:: A wide use of common-rail injection systems in vehicles made it necessary to develop effective methods of diagnosing and repair of their subassemblies. The paper presents problems connected with diagnosing of malfunctions and regeneration of common-rail system injectors with the use of testing tables. Due to precise workmanship and strong forces, the systems are particularly exposed to damage most often caused by the application of fuels of inadequate quality. Early detection of damage symptoms may contribute to considerable decrease of costs of repair without entailing any failures of other components of the system. The authors discuss the most common methods of evaluation of the condition allowing a quick and explicit identification, whether a given injector has been damaged or not. Further deliberations lead to the determination of possible regeneration of individual generation systems of various manufacturers. The authors also present basic activities of the regeneration process and tests made with the use of testing tables. The work presents results of tests performed on a new injector with the use of testing equipment of various manufacturers. Discussion on obtained results leads to conclusions that, due to little recurrence and insufficient accuracy of measurements, possibilities of clear evaluation of technical condition of injectors is greatly limited.
Źródło:: Journal of KONES; 2016, 23, 4; 209-216
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: Measurement methods for determining the parameters of injectors in internal combustion engines
Autorzy:: Grzesik, N.
Zaremba, R.
Powiązania:: https://bibliotekanauki.pl/articles/242709.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: engine
fuel injectors
fuel spray diagnostics
Opis:: The general principle of internal combustion engine operation has not changed since the engine structure was first developed. However, the system of blending the air and fuel into a mixture with the parameters ensuring effective fuel combustion processes has been evolving over the years. In the simplest engines, the fuel-air mixture was produced in the inlet manifold i.e. in the carburettor systems while the more advanced motors were equipped with the system of Single Point Injection (SPI), and further on with the Multi-Point Injection (MP!) where each of the cylinders has its own individual injector. The Multi-Point Injection (MPI) system has evolved into a Gasoline Direct Injection (GDI) system where the injector sprays fuel directly into the combustion chambers. Presently, due to the restrictive regulations governing the issues of exhaust gases ' composition and emissions, manufacturers of the engines used mainly in the automotive industry apply the system of multi-point indirect injection to the intake manifold or the system of direct fuel injection to the combustion chambers. In both systems, these are the injectors dosing precise amounts offuel, which are the most important, and the most accurate elements of the system. The article presents the injectors' macro- and microscopic parameters used for the purpose of the fuel dispersants' technical condition and performance assessment. Additionally, it refers to direct and optical methods of microscopic parameters measurement enabling fuel spray diagnostics.
Źródło:: Journal of KONES; 2014, 21, 4; 153-159
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 11.

Tytuł:: Autonomic logistics system of intelligent military motor vehicles
Autorzy:: Niziński, S.
Kupicz, W.
Powiązania:: https://bibliotekanauki.pl/articles/244540.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: motor vehicles
logistics
operation
diagnostics
steering
Opis:: The paper presents a concept of autonomic logistics system of intelligent military motor vehicles. A classification of vehicles and a definition of intelligent motor vehicles has been provided. The intelligent motor vehicle distinguishes the functional components systems and the integrated control system. The integrated system has been defined to control the intelligent motor vehicles, including subsystems of: data identification, information-and-decision-making and executive components. The data identification subsystem distinguishes the following components: logistic about the state of environment, navigation, and communications. The automatic logistic system consists of the following subsystems: diagnostic, operational, security, and power supply. The purpose and tasks of those subsystems have been examined. The information and decision-making subsystem has been defined: classic, expertise, and hybrid. Tasks of the vehicle setting components subsystem have been defined. A place of autonomic logistic system in the structure of the military motor vehicle has been determined. The development of a design and the implementation of the proposed concept of the autonomic logistic system will significantly increase the performance properties of military motor vehicles in aspect of effective execution of their combat missions.
Źródło:: Journal of KONES; 2011, 18, 1; 385-394
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 12.

Tytuł:: The effect of automotive vehicle braking system failure on driving safety
Autorzy:: Kowalski, M.
Powiązania:: https://bibliotekanauki.pl/articles/244871.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: car diagnostics
braking system
driving safety
Opis:: The paper describes systems responsible for driving safety of vehicles weighing up to 3.5 t. It is focused on selected failures (fouling) of braking systems that are typical during motor cars operation. Simulation testing regarding effect of selected failures (fouling) of braking system elements on braking force and braking efficiency were performed. In order to perform such testing, author of the paper worked out the methodology of testing which is also described here. The test results (partial) are displayed as tables and charts. The negative effect of selected failures on braking force and braking efficiency index is influencing directly on motor cars driving safety. It is also emphasized that it is important to maintain and observe automotive manufacturers’ technical requirements regarding braking system elements such as tyre pressure, tyre tread condition, brake shoes wear, etc. Basing on the test results it is found that excessive wear of tyres and brake shoes wear could be the reason of significant WSH index decrease resulting in faulty car. This can be visible through lower than allowable level of braking efficiency index WSH, which is the basic legal diagnostic parameter of break system condition assessment. Replacing such elements significantly improves braking efficiency index WSH.
Źródło:: Journal of KONES; 2013, 20, 1; 147-153
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 13.

Tytuł:: Tests results of new diagnostic method for WOLA marine diesel engines type H
Autorzy:: Lus, T.
Powiązania:: https://bibliotekanauki.pl/articles/245573.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
maritime transport
combustion engines
diagnostics
Opis:: Results of studies that aim was to develop a diagnostic method for WOLA marine diesel engines type H are presented in this paper. These engines are high-speed type units used to drive small vessels or more often to drive ship generators. Polish Navy is operating significant number engines of this type. Motors of this type do not have indicator valves, which complicates the assessment of their technical condition in exploitation. These engines also, because of their age, are relatively poorly equipped in control and measurement devices. In the era of cost reduction in operation of marine equipment there is also tendency to reduce the cost of maintenance and repair of diesel engines. One way to avoid malfunction of the motor can be systematic monitoring of the technical condition of selected critical systems using reliable diagnostic methods. Polish Naval Academy (PNA) in Gdynia for years has been doing research on methods of diagnosing marine internal combustion engines. In recent years, a diagnostic method for high-speed diesel engines based on the analysis of envelope of vibration accelerations generated by the valve gear mechanism and fuel system of WOLA type H engines has been developed. Preliminary tests were carried out on a six-cylinder WOLA engine type 57H6Aa in the Marine Power Plant Operation Laboratory in PNA. Verification tests were conducted on twelve-cylinders WOLA engines of the same type on navy vessels. The developed method allows determine the angles of opening and closing the fuel injection valves and angles of closing intake and exhaust valves during engine operation. Using this method it could not be clearly determined opening angles of intake and exhaust valves.
Źródło:: Journal of KONES; 2013, 20, 1; 193-200
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 14.

Tytuł:: Influence of diesel engine fuelling with faee and FAME on stream spray and ignition delay angels
Autorzy:: Kruczyński, S. W.
Orliński, P.
Orliński, S.
Powiązania:: https://bibliotekanauki.pl/articles/245807.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: engine diagnostics
ecological fuels and environment
Opis:: The paper presents results of examinations concerning stream spray and ignition delay angles of AD3.152 engine fuelled with mineral fuel Ekodiesel Plus 50B and comparatively fuelled with vegetable fuels like methyl ester FAME and ethyl ester FAEE. Using fuels of different physicochemical properties to diesel engines requires high accuracy of diagnostic parameters measurements in order to learn differences in processes of injection and combustion. Necessity of fulfilling more and more strong standards, concerning emission of toxic components of exhaust gases, forces users of diesel engines to posses quick and precision methods of their technical state assessment and particularly of a combustion process and of injection equipment technical state. Analysis of the obtained diagrams of fuel pressure in the injection pipe enables to determine fuel pressure increase rate. The investigations were carried out on the basis of speed external characteristic using test stand equipped with system of quick-changeable pressures measurements. Stream spray of fuel and ignition delay angles influence combustion process what is connected with emission of toxic components to environment. However, decay period time tested fuels and their limits appeared smaller for vegetable fuels. Considering the results, it is therefore decide to continue our experiments.
Źródło:: Journal of KONES; 2008, 15, 3; 253-258
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 15.

Tytuł:: Preliminary evaluation of effective vibration analysis for the fault diagnosis of natural gas engine-driven compressor
Autorzy:: Listewnik, K.
Polanowski, S.
Dereszewski, M.
Żukowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/247212.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: natural gas motor compressors
vibration diagnostics
Opis:: In this paper were presented results of preliminary research of the fault diagnosis of natural gas engine-driven compressor by vibration analysis. Natural gas engine-driven compressors are heavily exploited during delivering natural gas to the transmission network of Poland. Every failure brings about interferences to gas system, furthermore it causes notably cost of maintenances. The major failures are piston seizures and overly level of vibration causes by exceedingly wear, an unbalanced engine after repairs and dry friction. During research investigated three natural gas engine-driven compressors. Acceleration of engine cylinders was measured in cylinder axis and perpendicularly axis and acceleration of compressor cylinders, engine fundament and gas receiver in three axes. Results obtain during investigation of engine cylinders one gas engine-driven compressor collates with results of validation of engine cylinders after their stripping. Preliminary results of investigation indicate proper trend to set up diagnostic symptoms. It was found that for increasing of information amount is necessary to carry out synchronous measurements and its envelops in domain of crankshaft rotation angle. Very important source of diagnostic information can be shaft acceleration, determined basing on existing system of signals generation. The investigation is to be continued.
Źródło:: Journal of KONES; 2011, 18, 4; 243-250
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "Diagnostics" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język