@misc{Liebenow_Wilhelm_(1822–1897)_Special-Karte_[przed,
 author={Liebenow, Wilhelm (1822–1897)},
 copyright={Copyright by Uniwersytet Wrocławski},
 copyright={University of Wroclaw},
 howpublished={online},
 year={[przed 1870-},
 publisher={Herm. Oppermann},
 title={Special-Karte von Mittel-Europa 1:300 000 - Verdun 111.},
 type={obraz},
 keywords={mapa ogólnogeograficzna},
}