Iwegbue, C.M.A., G.E. Nwajei a, and F.O. Arimoro. 2007. “Characteristic Levels of Total Petroleum Hydrocarbons in Soil, Sediment and Surface Water of an Oil Impacted Area in the Niger Delta”. Biological Sciences - PJSIR 50 (4):247-50. https://v2.pjsir.org/index.php/biological-sciences/article/view/973.