Reza Rizwan, Singh Gurdeep, and Jain Manish Kumar. “Application of Heavy Metal Pollution Index for Ground Water Quality Assessment in Angul District of Orissa, INDIA”. International Journal of Research in Chemistry and Environment (IJRCE), vol. 1, no. 2, Sept. 2011, pp. 118-22, https://ijrce.org/index.php/ijrce/article/view/96.