Chauhan, R., and R. Bhardwaj. “Physio-Chemical Analysis of Sewage Water of Yamuna Nagar District of Haryana Before and After Treatment Using USAB”. Journal of Advanced Scientific Research, Vol. 3, no. 04, Nov. 2012, pp. 42-44, https://www.sciensage.info/index.php/JASR/article/view/129.