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SAMPERS, .; VAN DAMME, .; PAUWELS, . Cowpea (Vigna Unguiculata (L.) Walp.): Traditional and improved Cropping Methods in northern Nigeria. Afrika Focus, [S. l.], v. 2, n. 1, 1986. DOI: 10.21825/af.v2i1.6617. Disponível em: http://206.189.126.38:8087/index.php/AF/article/view/6617. Acesso em: 15 nov. 2024.