JOURNAL SYSTEM. AD, Volume 16, n° 1, 1991 - Full Issue. Africa Development, [S. l.], v. 16, n. 1, 1991. DOI: 10.57054/ad.v16i1.1977. Disponível em: https://journals.codesria.org/index.php/ad/article/view/1977. Acesso em: 27 jul. 2025.