A history of Byzantine music and hymnography

Wellesz, Egon 1885-1974. A history of Byzantine music and hymnography / Egon Wellesz . - 2nd edition, revised and enlarged . - Oxford : Clarendon Press, 1961 . - xiii, 461, vii p. ill., not. 24 cm.
К.: Бібліогр. : c. 428-441, Index