Elizabeth, O., E. Boniface, and A. Luke. “Integration of Hydrogeophysics and Principal Component Analysis in Hydrogeochemical Evaluation of Some Aquifers of Anambra Basin, Nigeria”. The International Journal of Science & Technoledge, vol. 5, no. 11, Nov. 2017, https://internationaljournalcorner.com/index.php/theijst/article/view/123683.