Singh, Amanjot, Jaieep Chauhan, and S.K. Shakya. 2022. “Status of Nitrate-Nitrogen and Salt Pollution in the Groundwater of District Ludhiana, Punjab”. Journal of Soil and Water Conservation 37 (1 & 2). https://epubs.icar.org.in/index.php/JSWC/article/view/129396.