Oboh I, Egun N. Utilization of water quality index (WQI) in water quality assessment of groundwater in Agbor metropolis, Delta State Nigeria. ISTJN [Internet]. 2018 Mar. 12 [cited 2024 Apr. 26];:048-55. Available from: https://journals.unam.edu.na/index.php/ISTJN/article/view/1215