Bishnoi, Suman, P. Sundaram, and P. Subramanian. “Comparative Efficiency of Household Water Filters on Bacteriological Quality of Drinking Water”. The Indian Journal of Nutrition and Dietetics 30, no. 9 (September 1, 1993): 259–265. Accessed November 7, 2024. https://informaticsjournals.co.in/index.php/ijnd/article/view/8104.