Osman, Yehia, Waled El-Senousy, Adel El-Morsi, and Mohammed Rashed. 2015. “Efficiency of Traditional Water Treatment Plant and Compact Units in Removing Viruses”. International Journal of Applied Sciences and Biotechnology 3 (3), 528-36. https://doi.org/10.3126/ijasbt.v3i3.13332.