The Cambridge medieval history /
Bury, John Bagnell.
Previté-Orton, C. W.
Tanner, J. R.(Joseph Robson),1860-1931.
Brooke, Z. N.(Zachary Nugent),1883-1946.
Hussey, J. M.(Joan Mervyn)
Cambridge,
1966-1967.
The Byzantine Empire. - Pt. 1. Byzantium and it's neighbours. - Pt. 2. Government, church and civilisation.