DIFFERENTIALS IN PROFITABILITY AND EFFICIENCY OF COWPEA MARKETING IN RURAL, SEMI- URBAN AND URBAN MARKETS IN NASARAWA STATE, NIGERIA . American International Journal of Agricultural Studies , [S. l.], v. 7, n. 1, p. 20–31, 2023. DOI: 10.46545/aijas.v7i1.287. Disponível em: https://www.acseusa.bdtopten.com/index.php/aijas/article/view/287. Acesso em: 1 feb. 2026.