Ololade, I.A., L. Lajide, and N.A. Oladoja. 2009. “Spatial Assessment of Polycyclic Aromatic Hydrocarbons in Streambed Sediments: Spatial Assessment of PAHs in Streambed Sediments”. Biological Sciences - PJSIR 52 (5):253-59. https://v2.pjsir.org/index.php/biological-sciences/article/view/557.