Chandra R, Srivastava VK, Nirupam S. A Study Of Chlorine Demand Of Various Water Sources In And Around Lucknow. Indian J Community Health [Internet]. 1990 Dec. 31 [cited 2024 Nov. 21];6(3):80-3. Available from: http://iapsmupuk.org/journal/index.php/IJCH/article/view/12