Otoide, J.E. and Tedela, P.O. 2017. Vehicular Traffic Air Pollution as Expressed by Leaves of Senna occidentalis (L.) Link from Three Busy Roads in Nigeria. Biological Sciences - PJSIR. 60, 3 (Dec. 2017), 162–167. DOI:https://doi.org/10.52763/PJSIR.BIOL.SCI.60.3.2017.162.167.