@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},
 type={Image},
 URL={http://rcin.org.pl/Content/93457/PDF/WA51_92573_PAND5102-r1943_Ravenstein-Karte-Osteuropa.pdf},
 keywords={World War II, East Europe, Soviet Union, Turkey, political-administrative maps},
}