“Comparative Physico-Chemical Analysis of Yamuna River, Delhi, at Okhla Barrage In Pre-Monsoon & Post-Monsoon Season”. Journal of Advances and Scholarly Researches in Allied Education 3, no. 5 (January 1, 2012): 0–0. Accessed October 26, 2026. https://www.ignited.in/index.php/jasrae/article/view/4112.