Most Popular Books
- The Jews in Egypt and in Palestine Under the Fatimid Caliphs: A Contribution to Their Political and Communal History Based Chiefly on Genizah Material Hitherto Unpublished; Volume 1
- The responsa of the Babylonian Geonim as a source of Jewish history: II
- Changes In The Divine Service Of The Synagogue Due To Religious Persecutions
