Yu, Zhengsong, and Yang Rui. “Distribution of Heavy Metals and Pollution Evaluation on Soil Surrounding the Metal Mining Area”. Journal of Mines, Metals and Fuels 65, no. 12 (December 1, 2017): 757–762. Accessed May 4, 2024. http://informaticsjournals.com/index.php/jmmf/article/view/26949.