@misc{Bibliographisches_Institut_(Lipsk)._Wydawca_Belgien_1940,
 author={Bibliographisches Institut (Lipsk). Wydawca},
 copyright={Public Domain},
 address={Leipzig},
 howpublished={online},
 year={1940},
 publisher={Bibliographisches Institut AG.},
 language={ger},
 title={Belgien u. Niederlande : Maßstab 1:1 650 000},
 URL={http://www.rcin.org.pl/igipz/Content/118053/PDF/WA51_133334_PAND6481-r1940-Belgien-Nederlande.pdf},
 keywords={political-administrative maps, Belgium, the Netherlands, Luxembourg, German occupation},
}