D.C. Nayak and S.K. Singh, S. R. S. R. (2018). Geostatistical and Multivariate Analysis of Heavy Metal Pollution of Coal-mine Affected Agricultural Soils of North-eastern India. Journal of the Indian Society of Soil Science, 66(1). https://epubs.icar.org.in/index.php/JISSS/article/view/80695