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Alfred J. Andrea , Ph.D. (1969) in History, Cornell University, is Professor Emeritus of Medieval History at the University of Vermont. He has published extensively on the Fourth Crusade, including The Capture of Constantinople: The 'Hystoria Constantinopolitana' of Gunther of Pairis (Philadelphia, 1997) and, most recently, Encyclopedia of the Crusades (Westport, 2003).