@misc{_Karte,
 howpublished={online},
 publisher={Heymann C.},
 language={ger},
 type={mapy},
 title={Karte des Wongrowiecer Kreises Reg. Bezk. Bromberg H. Delius grav. Nowack gez.},
 keywords={Wągrowiec, Wielkopolska 19w.},
}