Soto Silva I. William Echard. Psychedelic Popular Music: A History Through Musical Topic Theory. Indiana University Press, 2017, 306 pp. Alpha [Internet]. 10 de julio de 2020 [citado 7 de marzo de 2026];1(50):345-8. Disponible en: https://revistas.ulagos.cl/index.php/alpha/article/view/800