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