Kaseer, Nahidh W. “Study the Characteristic Performance of Trickling Filter for Pharmaceutical Waste Treatment”. Iraqi Journal of Chemical and Petroleum Engineering 2, no. 3 (September 30, 2001): 1–7. Accessed November 13, 2024. https://ijcpe.uobaghdad.edu.iq/index.php/ijcpe/article/view/584.