Schuman, W. H. (1942). Four canonic choruses for mixed voices a cappella. G. Schirmer.
Chicago Style aipamenaSchuman, William Howard. Four Canonic Choruses for Mixed Voices a Cappella. New York: G. Schirmer, 1942.
MLA aipamenaSchuman, William Howard. Four Canonic Choruses for Mixed Voices a Cappella. G. Schirmer, 1942.
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