“Estimation of Selected Heavy Metals and Bacteria in Sludge of Wastewater Treatment Unit at AL-Nassiryia City Southern of Iraq”. University of Thi-Qar Journal of Science 6, no. 3 (December 19, 2017): 107–114. Accessed December 26, 2024. http://mail.jsci.utq.edu.iq/index.php/main/article/view/42.