Birhanu , Birhanu, Getachew Animut, and Mengistu Urge. 2013. “Effect of Green Prosopis Juliflora Pods and Noug Seed (Guizotia Guizotia Obissynica) ) Cake Supplementation on Digestibility and Performance of Blackhead Ogaden Sheep Fed Hay As a Basal Diet”. Journal of Science, Technology and Arts Research 2 (2):38-47. https://journals.wgu.edu.et/index.php/star/article/view/123.