@misc{Ravenstein_Geographische_Verlagsanstalt_und_Druckerei._Wydawca_Ravensteins_1942,
 author={Ravenstein Geographische Verlagsanstalt und Druckerei. Wydawca},
 copyright={Public Domain},
 address={Frankfurt am Mein},
 howpublished={online},
 year={1942},
 publisher={Ravensteins Geographische Verlagsanstalt und Druckerei},
 language={ger},
 title={Ravensteins Welt-karte : 1:40 Mill},
 type={Image},
 URL={http://www.rcin.org.pl/igipz/Content/211260/PDF/WA51_180197_PAND4682-r1942_Ravensteins-Welt-kar.pdf},
 keywords={political-administrative maps, The Earth},
}