Rahmeta, Osman, and Shimelis Zewudie. “Coffee Market Chain Analysis in Manna District Jimma Zone, South Western Oromia, Ethiopia”. Ethiopian Journal of Applied Science and Technology 10, no. 2 (August 3, 2020): 46-52. Accessed December 6, 2021. https://journals.ju.edu.et/index.php/ejast/article/view/2156.