@misc{Ravenstein_Geographische_Verlagsanstalt_und_Druckerei._Wydawca_Ravenstein_1943,
 author={Ravenstein Geographische Verlagsanstalt und Druckerei. Wydawca},
 copyright={Public Domain},
 address={Frankfurt-Main},
 howpublished={online},
 year={1943},
 publisher={Ravenstein Geographische Verlagsanstalt und Druckerei},
 language={ger},
 title={Ravenstein Karte : Osteuropa : 1:3 1/3 mill},
 type={Image},
 URL={http://www.rcin.org.pl/igipz/Content/98939/PDF/WA51_89571_PAND14077-r1943_Ravenstein-Karte-O.pdf},
 keywords={World War II, Soviet Union, Eastern Europe, Turkey, political-administrative maps, political and administrative divisions},
}