@misc{_Karte_1868,
 copyright={Copyright by Uniwersytet Wrocławski},
 copyright={University of Wroclaw},
 howpublished={online},
 year={1868},
 publisher={Kgl. Preuss. Generalstab},
 language={ger},
 title={Karte des Deutschen Reiches 1:100 000 - 519. Ratibor},
}