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