File:1930 linguistic map.png

Summary
https://en.wikipedia.org/wiki/Bohemia#/media/File:Czechoslovakia1930linguistic.jpg CC BY 3.0view File:Czechoslovakia1930linguistic.jpg Created: 31 December 2007 Mariusz Paździora - Own work The map is based on the following sources: Czechoslovak geographical atlas (1936) map called: Republika Ceskoslovenska. Pomery narodnostni. Polish Geographical Atlas (Powszechny atlas geograficzny), Lwów 1928, map 48. Polish historical atlas (Atlas historyczny świata), Warsaw 1974, p. 120. German historical atlas Westermann Grosser Atlas zur Weltgeschichte, Brunswick 1956, p. 151. German Historischer Atlas, Berlin 1997, p. 99. Modified: Slovakia removed