@misc{Berliner_Lithographisches_Institut_Gea-Übersichtskarte_1941,
 author={Berliner Lithographisches Institut},
 copyright={Public Domain},
 address={Berlin},
 howpublished={online},
 year={1941},
 publisher={Gea Verlag Albers K.G.},
 language={ger},
 title={Gea-Übersichtskarte - Mitteleuropa 1:1 500 000},
 type={Image},
 URL={http://www.rcin.org.pl/igipz/Content/88538/PDF/WA51_89578_PAND6472-r1941_Mitteleuropa-Gea.pdf},
 keywords={railways, Central Europe, communication maps, political-administrative maps},
}