@article{Rivkin, author = {Rivkin, Ellis}, title = {The Sermons of Leon of Modena}, series = {The Hebrew Union College Annual, Vol. XXIII, Part II, Cincinnati 1950-1951, pp. 295-317.}, journal = {The Hebrew Union College Annual, Vol. XXIII, Part II, Cincinnati 1950-1951, pp. 295-317.}, language = {en} } @article{Rivkin, author = {Rivkin, Ellis}, title = {Some Historical Aspects of Authority in Judaism}, series = {Yearbook, Vol. LXI. The Central Conference of American Rabbis, 1951, pp. 3-15.}, journal = {Yearbook, Vol. LXI. The Central Conference of American Rabbis, 1951, pp. 3-15.}, language = {en} }