The Cambridge medieval history / planned by the late J.B. Bury - Bury, J. B. (John Bagnell), 1861-1927; Tanner, J. R. (Joseph Robson), 1860-1931; Previté-Orton, C. W. (Charles William), 1877-1947; Brooke, Z. N. (Zachary Nugent), 1883-1946 (Cambridge University Press, 1932)