Luay Q .Hashem, Fadel S. Guhe, Azzam H. Al-Hadithy, and Alham A. Hasson. “Qualitative Estimation For Northern and Southern Kufa Drainage Water of Najaf ”. Journal of Madenat Alelem University College, Vol. 8, no. 1, June 2016, pp. 48-59, http://116.203.176.164/index.php/JMAUC/article/view/130.