@misc{_Der_[1940],
 copyright={Public Domain},
 address={Gotha},
 howpublished={online},
 year={[1940]},
 publisher={Justus Perthes},
 language={ger},
 title={Der Nordseeraum : Maßstab 1:1 500 000 : Grundlage: Stielers Handatlas},
 type={Image},
 URL={http://www.rcin.org.pl/igipz/Content/216472/PDF/WA51_225426_PTGD584-r1940_Der-Nordseeraum_0001.pdf},
 keywords={chorographic maps, British Isles, North Sea (region), Benelux countries, North France, Denmark, West Germany},
}