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8Rene Lenormand,Etude sur l'harmonie moderne (A Study of Twentieth-Century Harmony). Translated by Herbert Antcliffe,New York: Da Capo Press, 1976: 62-63.
9Steven Baur,"Ravel's 'Russian' Period: Octatoni- cism in His Early Works, 1893-1908",Journal of the Ameri- can Musicological Society, 52/3 ( 1999 ): 531-92.
