Ahmadzai, M. K., M. Eliw, and D. Zhou. “Descriptive and Econometric Analysis of Wheat Production in Afghanistan (A Case Study in Paktia Province)”. South Asian Journal of Social Studies and Economics, Vol. 5, no. 3, Dec. 2019, pp. 1-10, doi:10.9734/sajsse/2019/v5i330146.