Chinwuko, A. I., Anakwuba, E.K., Okeke, H.C., Usman, A.O., Ovwasa, M.O., and Okoye, I.F. “Geo-Electric Investigation for Groundwater Potential in Awka, Anambra State, Nigeria”. International Journal of Science for Global Sustainability, vol. 1, no. 1, Dec. 2015, p. 11, https://fugus-ijsgs.com.ng/index.php/ijsgs/article/view/299.