Harry Partch - writings "Harry Partch Reviews Yasser's Theory of Evolving Tonality." Interval 4 (1985): 5-6. Partch, Harry. "Ratio Keyboard Design, September 1932." Interval 5 (1986-87): 14-17. Partch, Harry. Genesis of a Music, revised edition. New York: Da Capo Press, 1974. Partch, Harry. Bitter Music. Edited with an introduction by Thomas McGeary. Urbanna Il: University of IL Press, 1991. 4/92