1921. Map of Germany - Geological Map - Lassehne , 1921. Scale=1:25,000. Topography, geology, rock types for parts of Poland (old Prussia, pre-WW II Germ... Prussian Geological Institute.
1921. Map of Germany - Geological Map - Podejuch (Podjuchy), 1921. Scale=1:25,000. Topography, geology, rock types for parts of Poland (old Prussia, pre-... Prussian Geological Institute.
1921. Map of Germany - Geological Map - Sorenbohme, 1921. Scale=1:25,000. Topography, geology, rock types for parts of Poland (old Prussia, pre-WW II Ger... Prussian Geological Institute.