Al-Hassen, S. I. ., H. T. . Al-Saad, and D. J. . Al-Rubaiay. “An Analytical Study on Petroleum Hydrocarbons Contamination in the Urban Environment of Basra City, Southern Iraq”. Journal of Petroleum Research and Studies, vol. 4, no. 2, Sept. 2013, pp. 12-29, doi:10.52716/jprs.v4i2.97.