Changes in the socioeconomic profile of Piauí: From the Spix and Martius expedition to nowadays. Research, Society and Development, [S. l.], v. 10, n. 6, p. e14510615492, 2021. DOI: 10.33448/rsd-v10i6.15492. Disponível em: https://rsdjournal.org/rsd/article/view/15492. Acesso em: 5 dec. 2025.