Roberts, David Li. “Experimental Music Catalogue: Vocal Anthology, Bryn Harris Anthology-72, Nature Study Notes”. Contact: A Journal for Contemporary Music (1971-1990), no. 6 (March 1, 1973). Accessed December 19, 2024. https://journals.gold.ac.uk/index.php/contactjournal/article/view/contactjournal06_25-27.