Assefa, Berhanu. “DEFLUORIDATION OF ETHIOPIAN RIFT VALLEY REGION WATER USING REVERSE OSMOSIS MEMBRANES”. Zede Journal of Ethiopian Engineers and Architects 23 (January 31, 2023): 1–6. Accessed November 25, 2024. http://ejol.aau.edu.et/index.php/ZEDE/article/view/6524.