Northern Paraná under surveilance: searching and digitalization of photographs produced by the Paraná State Investigation Office of Social and Political Order (DOPS/PR) related with the North region. Revista de História Regional, [S. l.], v. 13, n. 1, 2008. Disponível em: https://revistas.uepg.br/index.php/rhr/article/view/2259. Acesso em: 10 jun. 2026.