The Cambridge medieval history : planned by J. B. Bury ; edited by J. R. Tanner, C. W. Previté-Orton, Z. N. Brooke. Volume 6, Victory of the papacy - Bury, J. B.; Previté-Orton, C. W.; Brooke, Z. N.; Tanner, J. R. (University Press, 1964)
First ed. 1929.
Keywords: keskiaika