@misc{Velhagen_&_Klasing._Wydawca_Velhagen_1940,
 author={Velhagen & Klasing. Wydawca},
 copyright={Public Domain},
 address={Bielefeld},
 address={Leipzig},
 journal={Velhagen & Klasings Karte},
 howpublished={online},
 year={1940},
 publisher={Verlag von Velhagen & Klasing},
 language={ger},
 title={Velhagen & Klasings Karte der Balkan},
 title={Der Balkan : Velhagen & Klasings Karte},
 URL={http://rcin.org.pl/Content/90191/PDF/WA51_87456_PAND4367-r1940_Velhagen_Klasings-Karte-der-Balkan.pdf},
 keywords={World War II, Balcans, historical maps, chorographic maps, political-administrative maps},
}