Basha , K., K. Dembi, and A. Girma. “Pre Extension Demonstration of Improved Potato at Midland Districts of Guji Zone, Southern Oromia, Ethiopia”. Scientific Journal of Crop Science, vol. 10, no. 2, Mar. 2021, pp. 457-63, http://sjournals.com/index.php/sjcs/article/view/1633.