HARMONY EXERCISES Cox, Mary Anthony Holograph in pencil. Four-part harmony exercises realized by Mary Anthony Cox under the tutelage of Nadia Boulanger between the years 1947 and 1949. Exercises are realizations of those found in the Traité d’harmonie théorique et pratique by Théodore Dubois, each realization corresponding to a page and exercise number in Dubois.…

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