Manning, Peter. “Review of Electronic Music From York. Three Record Set, Nos. YES 2-4. (Price £5, from Richard Orton, Department of Music, University of York)”. Contact: A Journal for Contemporary Music (1971-1990)0, no. 9 (September 1, 1974). Accessed January 21, 2022. https://journals.gold.ac.uk/index.php/contactjournal/article/view/contactjournal09_p31-33.