George Hunter, Apostle of Turkestan.
Mohammedanism, An Historical Survey.
The World of the Middle Ages.
History of the Arabs.
The Arabs: A Short History.
Arabs, Oil, and History.
The Government of Ethiopia.
Southeast Asia– A Crossroad of Religion.
Hispano-Arabic Poetry and its Relations with the Old Provencal Troubadours.
Ignace Goldziher Memorial Volume.
Introduction to the History of Science.