Pope Gregory XI : the failure of tradition - Thibault, Paul R., 1947- (Lanham, MD : University Press of America, 1986)
Includes index.
Bibliography: p. 223-237.
Keywords: Gregory -- XI, -- Pope, -- 1329-1378.; Church history -- Middle Ages, 600-1500.; Papacy -- History -- 1309-1378.; Popes -- Biography