A. Hasan, Ali. “THE EFFECTIVENESS OF RETURN SLUDGE IN REMOVING UNDESIRABLE MATERIALS FROM CLARIFLOCCULATOR BASINS”. Journal of Engineering and Sustainable Development 25, no. 5 (September 1, 2021): 95–102. Accessed July 2, 2025. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/39.