@misc{Demel_Bolesław_(_–1913)_Katalog_[po,
 author={Demel, Bolesław ( –1913) and Michalski, Jan (1876–1950). Kolekcjoner},
 copyright={Public Domain},
 howpublished={online},
 year={[po 1913]},
 language={pol},
 title={Katalog biblioteki Bolesława Demela},
 type={Text},
 URL={http://rcin.org.pl/ibl/Content/124495/PDF/WA248_153701_Rps-Fund-Mich-175_katalog-demela_o.pdf},
 keywords={Demel, Bolesław ( -1913), Library catalogs - 20th c.},
}