@misc{_Wehrkreis_[1941],
 copyright={Public Domain},
 address={[Posen]},
 howpublished={online},
 year={[1941]},
 publisher={[wydawca nieznany]},
 language={ger},
 title={Wehrkreis XXI (Reichsgau Wartheland) : Landschaftsgliederung},
 type={Image},
 URL={http://www.rcin.org.pl/igipz/Content/216461/PDF/WA51_225104_PAND2199-4-r1941_Wehrkreis-XXI-landschafts_0001.pdf},
 keywords={physico-geographical maps, Wartheland (Poland)},
}