Otoide, J. E., & 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), 162–167. https://doi.org/10.52763/PJSIR.BIOL.SCI.60.3.2017.162.167