Singerman Entry
Singerman ID#S569
Der sotsyal-demokrat. 1899-
Notes
New York. Edited by Michael Zametkin. Cf. Kalendar un almanokh tsu dem finf-yohrigen yubileum fun "Forverts" (New York, 1902), p. 57, Weissberger 113, Leksikon fun der nayer yidisher literatur, vol. 3, col. 543-47.