@misc{Schlotke_Julius_Lehrbuch,
 author={Schlotke, Julius and (1839-1907). and Autor},
 howpublished={online},
 publisher={Verlag von Gerhard Kühtmann},
 language={niemiecki},
 type={książka},
 title={Lehrbuch der darstellenden Geometrie.},
 keywords={geometria, perspektywa},
}