@misc{_Plan,
 address={Bydgoszcz},
 howpublished={online},
 publisher={[s.n.]},
 language={pol},
 title={Plan miasta Bydgoszczy},
 type={mapa},
 keywords={Bydgoszcz -- mapy -- 1939-1945 r, Bydgoszcz -- plan miasta},
}