Degefu, F, A Lakew, Y Tigabu, and K Teshome. “The Water Quality Degradation of Upper Awash River, Ethiopia”. Ethiopian Journal of Environmental Studies and Management 6, no. 1 (January 22, 2013): 58–66. Accessed October 23, 2026. https://www.ajol.info/index.php/ejesm/article/view/84741.