@misc{_Plan,
 address={[s.l.]},
 howpublished={online},
 publisher={[s.n.]},
 language={ger},
 language={pol},
 title={Plan der Stadt Warschau = Plan miasta Warszawy},
 type={mapa},
 keywords={Warszawa -- mapy -- 1939-1945 r, Warszawa -- plan miasta, plany miast},
}