, . . Lettere a Valeri (1950-1968). Studi sulla Formazione/Open Journal of Education, [S. l.], v. 17, n. 1, p. 37–40, 2014. DOI: 10.13128/Studi_Formaz-15028. Disponível em: https://oajournals.fupress.net/index.php/sf/article/view/9335. Acesso em: 2 may. 2024.