Nigussie, Helen, Yoseph Mekasha, Solomon Abegaz, Kefelegn Kebede, and Sanjoy Kumar Pal. 2015. “Indigenous Sheep Production System in Eastern Ethiopia: Implications for Genetic Improvement and Sustainable Use”. American Scientific Research Journal for Engineering, Technology, and Sciences 11 (1):136-52. https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/603.