WILLIAMSON, L. Letter to the Editor. Contact: A Journal for Contemporary Music (1971-1990), [S. l.], n. 2, 1971. DOI: 10.25602/GOLD.cj.v0i2.865. Disponível em: https://journals.gold.ac.uk/index.php/contactjournal/article/view/contactjournal02_p37b. Acesso em: 28 apr. 2024.