Shoufani, Elias Shukri, 1932- al-Riddah and the Muslim conquest of Arabia a re-evaluation / [microform] : by Elias Shukri Shoufani - Ann Arbor, Mich. : University Microfilms International, 1968 - 1 microfilm reel : positif ; 35 mm. Thesis (Ph.D.) - Princeton University, 1968 Subjects--Geographic Terms: Islamic Empire--History