“Groundwater Quality Appraisal of Some Hand-Dug Wells and Boreholes Around Okemesi and Ikoro Area, Southwestern Nigeria”. Global Journal of Science Frontier Research 12, no. H2 (May 15, 2012): 17–33. Accessed April 9, 2026. https://journalofscience.org/index.php/GJSFR/article/view/709.