Islam, S., T. Rasul, J. Bin Alam, and M. A. Haque. “Evaluation of Water Quality of the Titas River Using NSF Water Quality Index”. Journal of Scientific Research 3, no. 1 (December 20, 2010): 151. Accessed May 24, 2022. https://banglajol.info/index.php/JSR/article/view/6170.