Professional qualifications offered by the second-degree schools in the state of Rio Grande do Norte from 1971 to 1996. Research, Society and Development, [S. l.], v. 9, n. 2, p. e18921960, 2020. DOI: 10.33448/rsd-v9i2.1960. Disponível em: https://ojs34.rsdjournal.org/index.php/rsd/article/view/1960. Acesso em: 28 jun. 2025.