Ball, A., I. Moody, and J. Ingram. “Controversies Incorporated: Bridging That Gap; The Mystic’s Point of View; The Notation of Time: A Reaction to Richard Barrett’s Reply”. Contact: A Journal for Contemporary Music (1971-1990), no. 31, Sept. 1987, doi:10.25602/GOLD.cj.v0i31.1280.