MORTKHE KOYFMAN (MARTIN KAUFMAN)
He lived in New York. He published humorous sketches and scenes in the leftist Yiddish press. In book form: Prolet-shtifer (Proletarian brat) (New York: Royte fedim, 1934), 124 pp.
Berl Kagan, comp., Leksikon fun yidish-shraybers (Biographical dictionary of Yiddish writers) (New York, 1986), col. 481.