Rochberg, George. The hexachord and its relation to the 12-tone row. - Bryn Mawr, Pa., Presser [1955] - 40 p. illus. 27 cm. LCCN: 55027570 Subjects--Personal Names: Schoenberg, Arnold, 1874-1951. Subjects--Topical Terms: Hexachords.Twelve-tone system. LC Class. No.: MT50 / .R67 Dewey Class. No.: 781.25 ROC