“Physico-Chemical and Bacterialogical Analysis of the Surface Water Used for Domestic Purposes in Okpai and Beneku, Delta State, Nigeria”. Global Journal of Human-Social Science 12, no. B13 (January 10, 2013): 31–36. Accessed August 8, 2026. https://socialscienceresearch.org/index.php/GJHSS/article/view/451.