@misc{Szafer_Władysław_(1886–1970)_Kartoteka_Unpublished,
 author={Szafer, Władysław (1886–1970)},
 copyright={Public Domain},
 howpublished={online},
 year={Unpublished},
 language={mul},
 title={Kartoteka "Biblioteka Prof. Władysława Szafera" : Niz-Op},
 type={Text},
 URL={http://rcin.org.pl/Content/79087/PDF/KR171_93962_Kart-Szafera_Niz-Op.pdf},
}