Search for: [Subject and Keywords = Polska] OR [Subject and Keywords = Polska Rzeczpospolita Ludowa] OR [Subject and Keywords = opozycja] OR [Subject and Keywords = 20w.] OR [Subject and Keywords = PRL] OR [File name = Biuletyn Solidarności. \[Tygodnik NSZZ \"Solidarność\" Region Środkowo\-Wschodni\], nr 2] OR [Creator = brak autora]