Karte des Deutschen Reiches, 1921–1945Topo: Austro-Hungarian & German description Karte des Deutschen Reiches 1:100 000, Großblatt/Einheitsblatt. Deutsche Heereskarte Großblatt” (German Army maps) at 1:100000 of East Prussia, Latvia, Lithuania, Poland and Belorussia SSR. (Published by the OKH/ General Staff of the Army, Chief of War Maps and Surveying.) Year 1921–1945 Author – Sources www.mapywig.org