Kamlesh Verma, and Vinay Kumar Rai. “Assessment of Drinking Water Quality Supplied to Primary Schools: A Case Study of Ballia City, Uttar Pradesh”. National Geographical Journal of India 67, no. 4 (December 31, 2021): 414–425. Accessed July 12, 2025. http://65.0.158.54/index.php/ngji/article/view/297.