@misc{Zylberberg_Abram_[?]_Collection,
 author={Zylberberg, Abram [?]},
 howpublished={online},
 type={scan of a glass negative},
 title={Collection of photographs},
 keywords={collection of glass negatives, Faces of a non-existent city (photo collection), Rynek 4, collection of photographs, Jewish History Tours},
}