JOURNAL SYSTEM. 8 - Index to Africa Development, Vol. XV, Nos. 1 - 4, 1990. Africa Development, [S. l.], v. 16, n. 1, 1991. DOI: 10.57054/ad.v16i1.2747. Disponível em: https://journals.codesria.org/index.php/ad/article/view/2747. Acesso em: 30 jul. 2025.