Nicholas Morton, The Crusader States and Their Neighbours, A Military History, 1099-1187 [1]
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Fink, Harold S. (1969). "The Foundations of the Latin States, 1099-1118." In Setton, Kenneth M.; Baldwin, Marshall W. (eds.). A History of the Crusades: I. The First Hundred Years. Madison: The University of Wisconsin Press. p. 380.
