Yang, Yongjie, Yue Yu, Rui Zhou, Zhiqiang Ma, Lijun Ren, Lejian Zhang, and Yi’an Di. “Elemental Compositions and Size Distributions of PM Between Urban and Rural Site in Beijing During the Spring of 2012”. Asian Journal of Chemistry 26, no. 11 (May 27, 2014): 3180–3186. Accessed November 25, 2024. https://asianpubs.org/index.php/ajchem/article/view/26_12_12.