BIBLIOGRAPHY CONTRIBUTOR Isadore Twersky First name Isadore Last name Twersky Bibliography entries by this contributor Twersky, Isadore, Jay Harris, and Y.Tzvi Langermann. 1993. “Some Astrological Themes In The Thought Of Abraham Ibn ʿEzra”. In Rabbi Abraham Ibn Ezra: Studies In The Writings Of A Twelfth‐Century Jewish Polymath, 28-85. Cambridge, MA: Harvard University Press.