Comparison of data on deaths by Covid-19 between three sources of information, Maranhão. Research, Society and Development, [S. l.], v. 9, n. 9, p. e94996894, 2020. DOI: 10.33448/rsd-v9i9.6894. Disponível em: https://rsdjournal.org/rsd/article/view/6894. Acesso em: 5 dec. 2025.