Hashim Mahmood an, Y. Shehab A, M. Saleh Al- Obaidi R. Early Prediction Of Toxic Shocks Happening In Activated Sludge Biological Systems. AREJ [Internet]. 2010 Feb. 28 [cited 2025 Sep. 8];18(1):26-35. Available from: https://jamh.uomosul.edu.iq/index.php/arej/article/view/30752