Search for: [Subject and Keywords = state borders] OR [Subject and Keywords = permeability of borders] OR [Subject and Keywords = Poland] OR [Subject and Keywords = granice państwowe] OR [Subject and Keywords = przenikalność granic] OR [Subject and Keywords = Polska] OR [Title = Granice Polski \: analiza zmian przenikalności w latach 1990\-1996 = Poland's borders \: analysis of permeability \(1990\-1996\)] OR [Title = Granice Polski \: analiza zmian przenikalności w latach 1990\-1996 = Poland's borders \: analysis of permeability \(1990\-1996\)] OR [Creator = Komornicki, Tomasz] OR [Creator = Komornicki, Tomasz]