“Concentration of Some Trace Elements in Falling Particulate and Soil in Vicinity Region of Bricks Factories in Al-Nassiriya City. ”. University of Thi-Qar Journal of Science, vol. 3, no. 1, July 2011, pp. 76-88, http://mail.jsci.utq.edu.iq/index.php/main/article/view/232.