Search for: [Subject and Keywords = regional natural environment \-\- Poland] OR [Subject and Keywords = Świdry Małe \(Józefów, Poland\)] OR [Subject and Keywords = Józefów, Otwock county, mazowieckie voivodeship \(Poland\)] OR [Subject and Keywords = Vistula Valley \(Poland\)] OR [Subject and Keywords = środowisko naturalne regionu \-\- Polska] OR [Subject and Keywords = Świdry Małe \(Józefów, Polska\)] OR [Subject and Keywords = Józefów, pow. Otwock, woj. mazowieckie \(Polska\)] OR [Subject and Keywords = Wisły dolina \(Polska\)] OR [Title = Świdry Małe \: Wisła poniżej ujścia Świdra] OR [Creator = Sawicki, Ludwik \(1893–1972\)]