A. Singh, J. Chauhan, and S. Shakya, “Status of Nitrate-nitrogen and Salt Pollution in the Groundwater of District Ludhiana, Punjab”, JSWC, vol. 37, no. 1 & 2, Oct. 2022, Accessed: Jun. 12, 2026. [Online]. Available: https://epubs.icar.org.in/index.php/JSWC/article/view/129396