The working class of Paraná in the documents of National Information Service (1964-85). Research, Society and Development, [S. l.], v. 9, n. 9, p. e34996511, 2020. DOI: 10.33448/rsd-v9i9.6511. Disponível em: https://rsdjournal.org/rsd/article/view/6511. Acesso em: 5 dec. 2025.