*Robert of Ketton's Qu'ran, as edited by Bibliander (1550 revised edition)*Norman Roth, "Jewish Collaborators in Alfonso's Scientific Work," in Robert I. Burns, ed., "Emperor of Culture: Alfonso X the Learned of Castile and His Thirteenth-Century Renaissance Culture"*George Sarton: "A Guide to the History of Science" Waltham Mass.
==External links==*Robert of Ketton's Qu'ran, as edited by Bibliander (1550 revised edition)*Norman Roth, "Jewish Collaborators in Alfonso's Scientific Work," in Robert I. Burns, ed., "Emperor of Culture: Alfonso X the Learned of Castile and His Thirteenth-Century Renaissance Culture"*George Sarton: "A Guide to the History of Science" Waltham Mass.