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Li, Xing, Shanshan Li, Qiulin Xiong, Xingchuan Yang, Mengxi Qi, Wenji Zhao, and Xinlong Wang. "Characteristics of PM(2.5) Chemical Compositions and Their Effect On Atmospheric Visibility in Urban Beijing, China During the Heating Season." Int J Environ Res Public Health 2018.

Li, Xing, et al. "Characteristics of PM(2.5) Chemical Compositions and Their Effect On Atmospheric Visibility in Urban Beijing, China During the Heating Season." Int J Environ Res Public Health 2018.