BIBLIOGRAPHY CONTRIBUTOR A.I. Sabra First name A.I. Last name Sabra Bibliography entries by this contributor Sabra, A.I. 1969. “Simplicius’s Proof of Euclid’s Parallels Postulate”. Journal of the Warburg and Courtauld Institutes 32: 1-24. Sabra, A.I. 1965. “A Twelfth-Century Defence of the Fourth Figure of the Syllogism”. Journal of the Warburg and Courtauld Institutes 28: 14-28.