Santos, R. E. (1956). Twelve piano pieces in the twelve-tone technique. s.n.
Chicago Style aipamenaSantos, Rosendo E. Twelve Piano Pieces in the Twelve-tone Technique. [London: s.n, 1956.
MLA aipamenaSantos, Rosendo E. Twelve Piano Pieces in the Twelve-tone Technique. s.n, 1956.
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