Heer, Friedrich, 1916-1983. The medieval world: Europe, 1100-1350, by Friedrich Heer. Translated from the German by Janet Sondheimer. - New York, The New American Library [c1962] - xvi, 432p. illus. 18cm. - Mentor book, MQ524 . Translation of Mittelalter. Bibliography: p. 408-420. Subjects--Topical Terms: Middle Ages.