Search for: [Subject and Keywords = hydrology] OR [Subject and Keywords = Poland] OR [Subject and Keywords = hydrographical maps] OR [Subject and Keywords = 1945\-1990] OR [Subject and Keywords = Hydrologia \-\- Polska \[KABA\]] OR [Subject and Keywords = Mapy hydrograficzne \-\- 1945\-1990 \[KABA\]] OR [Title = Przeglądowa mapa hydrograficzna Polski \: 1\:500 000. Ark. Gdańsk] OR [Title = Przeglądowa mapa hydrograficzna Polski 1\:500 000. Ark. Gdańsk]