@misc{_Karte_b.r.,
 copyright={Copyright by Uniwersytet Wrocławski},
 copyright={University of Wroclaw},
 howpublished={online},
 year={b.r.},
 publisher={s.n.},
 language={ger},
 title={Karte des Deutschen Reiches 1:100 000 - 424 (270). Breslau},
}