Worku, Y., S. Ejigu, W. Erge, and L. Jemaneh. “Chemical, Physical, and Microbiological Characterstics of Various Sources of Water in and Around Addis Ababa”. The Ethiopian Journal of Health Development, vol. 13, no. 3, Mar. 2017, https://ejhd.org/index.php/ejhd/article/view/920.