Mbwette, T.S.A., and A.W. Kariuki. “The Performance of a Horizontal Flow Roughing filter/Slow Sand Filter Water Treatment Plant in Tanzania”. Tanzania Journal of Engineering and Technology 16, no. 1 (June 30, 1992): 62-82. Accessed November 23, 2024. https://tjet.udsm.ac.tz/index.php/tjet/article/view/138.