Olatunji Olatunde, S. and Oladele, O. 2013. Assessment of Atmospheric Profile of Some Heavy Metals in Barks of Parkia biglobosa (African locust bean) Trees. Asian Journal of Chemistry. 25, 8 (Mar. 2013), 4232–4236. DOI:https://doi.org/10.14233/ajchem.2013.13911.