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