Mukherjee, P., and A. . Mazumder. “Analysis of Groundwater Quality of Borough X (10), Kolkata for Assessment of Pre-Monsoon and Post Monsoon Variation”. International Journal of Technical Innovation in Modern Engineering & Science, vol. 4, no. 12, Dec. 2018, pp. 695-01, https://ijtimes.com/index.php/ijtimes/article/view/349.