Economic Efficiency of Cocoa Production in Gashaka Local Government Area, Taraba State, Nigeria. Mediterranean Journal of Social Sciences, [S. l.], v. 6, n. 1 S1, p. 570, 2015. Disponível em: https://www.richtmann.org/journal/index.php/mjss/article/view/5575.. Acesso em: 18 jul. 2024.