ROBERTS, D. L. Review of 1973/02/28 and 1973/03/01 Concert at Barber Institute, Birmingham. The Matrix. Contact: A Journal for Contemporary Music (1971-1990), [S. l.], n. 6, 1973. DOI: 10.25602/GOLD.cj.v0i6.916. Disponível em: https://journals.gold.ac.uk/index.php/contactjournal/article/view/contactjournal06_p39-40. Acesso em: 25 apr. 2024.