TY - JOUR A1 - Rivkin, Ellis T1 - The Sermons of Leon of Modena JF - The Hebrew Union College Annual, Vol. XXIII, Part II, Cincinnati 1950-1951, pp. 295-317. Y1 - 1950 N1 - Special print ER - TY - JOUR A1 - Rivkin, Ellis T1 - Some Historical Aspects of Authority in Judaism JF - Yearbook, Vol. LXI. The Central Conference of American Rabbis, 1951, pp. 3-15. Y1 - 1951 N1 - Special print ER -