“The Case of the ‘Som Imaginário’ Band: : Counterculture, Experimentation and the Music Industry Between the 1960s and 1970s in Brazil”. Per Musi, no. 30 (November 20, 2014): 1–11. Accessed October 4, 2025. https://periodicos-hml.cecom.ufmg.br/index.php/permusi/article/view/38864.