Althwainy, Muntaha. N., et al. “Estimation of Heavy Metal Concentrations in Solid Particles Residue Collected from Baghdad Street Dust”. Ibn AL-Haitham Journal For Pure and Applied Sciences, vol. 26, no. 2, Apr. 2017, pp. 1-7, https://jih.uobaghdad.edu.iq/index.php/j/article/view/453.