Tobias, Norman

• Balkan Studies Τόμ. 8 Αρ. 2 (1967) - Βιβλιοκρισία
  The Cambridge Medieval' History. Vol. IV: The Byzantine Empire. 2d ed. rev. Part I : Byzantium and its neighbors. Edited by J. M. Hussey, with the assistance of D. M. Nicol and G. Cowan. London: Cambridge University Press, 1966. Pp. xi-f 1168
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