JOURNAL SYSTEM. 0 - Prelim. Africa Development, [S. l.], v. 9, n. 4, 1984. DOI: 10.57054/ad.v9i4.3137. Disponível em: https://www.journals.codesria.org/index.php/ad/article/view/3137. Acesso em: 5 aug. 2025.