Rai, A. K., and B. Paul. “Degradation of Soil Quality Parameters Due to Coal Mining Operations in Jharia Coalfield, Jharkhand, India”. Advances in BioScience, vol. 2, no. 2, Apr. 2011, pp. 51-56, https://e-journal.sospublication.co.in/index.php/ab/article/view/63.