Yousef M.J. Omar, N., bin Abas, M. R., Aziz Ketuly, K., & Mohd. Tahir, N. (2002). Chracterization of Solvent-Extractable Hydrocarbons in Airborne and Roadside Soil Particles of Kuala Lumpur, Malaysia. Malaysian Journal of Science, 21(1&2), 171–178. Retrieved from http://mojes.um.edu.my/index.php/MJS/article/view/8606