Dawood, Ammar. “GIS Approach for Spatial Distribution Analysis of Groundwater Quality at South-West Part of Basrah”. Journal of Engineering 24, no. 8 (July 28, 2018): 81-95. Accessed April 4, 2020. http://joe.uobaghdad.edu.iq/index.php/main/article/view/j.eng.2018.08.07.