Oboh, I. and Egun, N. (2018) “Utilization of water quality index (WQI) in water quality assessment of groundwater in Agbor metropolis, Delta State Nigeria”, International Science and Technology Journal of Namibia, pp. 048–055. Available at: https://journals.unam.edu.na/index.php/ISTJN/article/view/1215 (Accessed: 20 April 2024).