B. K. Das, “Assessment of water quality using the Overall Index of Pollution and Comprehensive Pollution Index at the upper stretch of River Ganga: Pollution indices of River Ganga”, J Inland Fish Soc India, vol. 54, no. 2, pp. 172–180, Jul. 2023, Accessed: Jun. 01, 2026. [Online]. Available: https://epubs.icar.org.in/index.php/JIFSI/article/view/138472