Alsaqqar, Awatif, Basim Khudair, and Ahmed Al-Sulaiman. “Slow Sand Filtration As a Tertiary Treatment for the Secondary Effluent from Sewage Treatment Plant”. Association of Arab Universities Journal of Engineering Sciences 25, no. 3 (September 10, 2018): 169-179. Accessed May 5, 2024. https://jaaru.org/index.php/auisseng/article/view/176.