Wang, Yan, Kun Tian, Hui Wang, and Wenjuan Sang. 2015. “An Investigation of Gross α & Gross β Radioactivity Level of Xiaoqing River from 2008 to 2015”. International Journal of Scientific Reports 1 (5):226-27. https://doi.org/10.18203/issn.2454-2156.IntJSciRep20150895.