Amadi, A.N., Olasehinde, P.I., Yisa, J., Shaibu, I., and Okoye, N.O. “Environmental Geochemistry and Heavy Metal Assessment in Soils, Surface and Groundwater from Eastern Niger-Delta, Nigeria Using Multivariate Pollution Indices”. International Journal of Science for Global Sustainability 2, no. 3 (September 26, 2016): 15. Accessed November 13, 2026. https://fugus-ijsgs.com.ng/index.php/ijsgs/article/view/235.