Omeje, Emmanuel Ejiofor, Chukwuemeka John Arene, and Benjamin Chiedozie Okpukpara. “Effectiveness Analysis of Agricultural Protection Policy on Food Supply, Export and Farmer-Welfare in Nigeria: Generalized Method of Moment Approach”. American International Journal of Agricultural Studies 1, no. 1 (November 17, 2018): 38-59. Accessed April 16, 2021. https://www.acseusa.org/journal/index.php/aijas/article/view/16.