Search for: [Subject and Keywords = Politechnika Warszawska] OR [Subject and Keywords = historia Politechniki Warszawskiej] OR [Subject and Keywords = elektronika] OR [Subject and Keywords = lampy elektronowe] OR [Subject and Keywords = biografie profesorów Politechniki Warszawskiej] OR [Subject and Keywords = radiotechnika] OR [Subject and Keywords = technika wysokiej próżni] OR [Subject and Keywords = lampy katodowe] OR [Title = Janusz Groszkowski \(1898\-1984\)]