Search for: [Subject and Keywords = Nature \- research \- Poland] OR [Subject and Keywords = Scientific journals Poland \- 1900\-1945] OR [Subject and Keywords = Przyroda \- badania \- Polska] OR [Subject and Keywords = Czasopisma naukowe polskie \- 20 w.] OR [Title = Kosmos. Seria A, Rozprawy, Rocznik 63, Zeszyt 3] OR [Title = Kosmos. Seria A, Rozprawy, Rocznik 63, Zeszyt 3] OR [Creator = Szymkiewicz, Dezydery \(1885–1948\)] OR [Creator = Kulczyński, Stanisław \(1895–1975\)] OR [Creator = Szymkiewicz, Dezydery \(1885–1948\)] OR [Creator = Kulczyński, Stanisław \(1895–1975\)]