@misc{Pietsch_Ludwig_(1824-1911)_Knaus,
 author={Pietsch, Ludwig (1824-1911)},
 address={Bielefeld},
 howpublished={online},
 publisher={Velhagen & Klasing},
 language={ger},
 title={Knaus},
 type={książka},
 keywords={Knaus, Ludwig (1829-1910), Malarstwo niemieckie -- 19-20 w},
}