and the origin of the First Crusade", Byzantion 19 (1949) "On the Social Structure and Economic Organization of the Byzantine Empire in the Thirteenth Century and Later", Byzantinoslavica 12 (1951) "Ethnic Changes in the Byzantine Empire in the Seventh Century", Dumbarton Oaks Papers 13 (1959) "The Armenians in the Byzantine Empire", Byzantinoslavica 22 (1961), Repr. Lisbon, 1963, London, 1972 "Observations on the Demography of the Byzantine Empire", XIII International Congress of Byzantine Studies, Oxford, 1966 References American Byzantinists Armenian studies scholars 1908 births 1985 deaths People from Lemnos Greek emigrants to the United States Rutgers University alumni University of Wisconsin–Madison alumni Rutgers University faculty Recipients of the Order of the Phoenix (Greece) 20th-century American historians 20th-century American male writers Scholars of Byzantine history American male non-fiction writers