Yang, Hong-Bin, Ming-Zhu Liu, Hong-Han Chen, Guo-Ping He, Xunhong Chen, and Dong-Hui Cheng. “Groundwater Quality Evolution Under Urbanization in Beijing Urban Area, Northern China”. Asian Journal of Chemistry 26, no. 4 (February 15, 2014): 1069–1076. Accessed November 25, 2024. https://asianpubs.org/index.php/ajchem/article/view/26_5_27.