From

Modeling the Groundwater Quality in parts of Eastern Niger-Delta, Nigeria using Multivariate Statistical Techniques

Amadi A.N., Nwankwoala H.O., Jimoh M. O., Dan-Hassan M. A., Aminu Tukur

American Journal of Water Resources. 2014, 2(5), 118-125 doi:10.12691/ajwr-2-5-3