Ahmad SR, Khan MS, Khan AQ, Ghazi S, Ali S. Sewage Water Intrusion in the Groundwater of Lahore, its Causes and Protections. Pak. J. Nutr. [Internet]. 2012 Apr. 15 [cited 2025 Aug. 15];11(5):484–488. Available from: https://pjnonline.org/pjn/article/view/1645