Der Urshprung fun Pesah.
New York: Dem Yidishn Historishn Seminar, 1926. Hardbound. Small octavo, green cloth with black lettering, 143 pp., notes, bibliography. In Yiddish. Arbetn fun Yidishn Historishn Seminar Unter der Leitung fun Dr. Jacob Shatzky. Band Ayns. Inscribed by the author on the reverse of the half-title page. More