Ghani, Mastura. “Colour and E. Coli Removals by Riverbed Filtration – A Physical Modelling Study at Different Filter Bed Depths and Inflow Rates”. International Journal of Integrated Engineering 11, no. 2 (May 6, 2019). Accessed August 7, 2026. https://journal.uthm.edu.my/index.php/ijie/article/view/4239.