Sami. A. Zbaar, and Shaker M. Marbut. “Heavy Metal Contamination of Drinking Water in the City of Baiji ”. Journal of Madenat Alelem University College, Vol. 1, no. 1, June 2009, pp. 29-38, http://116.203.176.164/index.php/JMAUC/article/view/291.