@misc{Bumstead_Albert_Holt_(1875–1940)._Red._Central_1939,
 author={Bumstead, Albert Holt (1875–1940). Red. and National Geographic Society. National Geographic Maps},
 copyright={Public Domain},
 address={Washington},
 howpublished={online},
 year={1939},
 publisher={National Geographic Society},
 language={eng},
 title={Central Europe and the Mediterranean : as of september 1, 1939},
 keywords={political-administrative maps, chorographic maps, Central Europe, 20th century},
}