Friend, Howard C. “Review of 1972/01/17 Concert at The Roundhouse, London. BBC Symphony Orchestra, Conducted by Pierre Boulez”. Contact: A Journal for Contemporary Music (1971-1990), no. 4 (March 1, 1972). Accessed December 19, 2024. https://journals.gold.ac.uk/index.php/contactjournal/article/view/contactjournal04_p25-27.