Amare, Birhanu, Fetien Abay, and Yemane Tsehaye. “Evaluation of Sweet Potato (Ipomea Batata l.) Varieties for Total Storage Root Yield in South and South East Zones of Tigray, Ethiopia”. American Journal of Trade and Policy 1, no. 2 (August 31, 2014): 74–78. Accessed November 23, 2024. https://abc.us.org/ojs/index.php/ajtp/article/view/366.