@misc{_Wanderkarte_1942,
 copyright={Public Domain},
 address={Warschau},
 howpublished={online},
 year={1942},
 publisher={Kr. Kart. u. Verm. Amt},
 language={ger},
 title={Wanderkarte Warschau - Umgebung},
 keywords={tourist maps, Warsaw region},
}