Yohannes Yihdego, and Alamgir Khalil. “Economic and Environmental Management of Water Resources: Perspective of Groundwater”. Global Journal of Human-Social Science 17, no. B2 (May 15, 2017): 45–52. Accessed May 6, 2024. https://socialscienceresearch.org/index.php/GJHSS/article/view/2241.