“Optimizing Bio-Sand Filter (BSF) for Maximum Thermotolerant Coliform (TTC) removal from Drinking Water in West Bank” (2021) Global Journal of Science Frontier Research, 21(H4), pp. 33–39. Available at: https://journalofscience.org/index.php/GJSFR/article/view/2967 (Accessed: 24 September 2026).