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