JOURNAL SYSTEM. AD, Volume 7, n° 3, 1982 - Full Issue. Africa Development, [S. l.], v. 7, n. 3, 1982. DOI: 10.57054/ad.v7i3.2009. Disponível em: https://journals.codesria.org/index.php/ad/article/view/2009. Acesso em: 8 jun. 2025.