محمد بهاء حسين, and حميد محمد كريم. “Designing System Cost for Water Pollution Plants in Mayoralty of Baghdad”. Journal of Economics and Administrative Sciences 20, no. 77 (June 1, 2014): 359. Accessed May 2, 2025. https://www.jeasiq.uobaghdad.edu.iq/index.php/JEASIQ/article/view/710.