1. PM2.5 mass, chemical composition, and light extinction before and during the 2008 Beijing Olympics. Issue 21 (13th November 2013) Authors: Li, Xinghua; He, Kebin; Li, Chengcai; Yang, Fumo; Zhao, Qing; Ma, Yongliang; Cheng, Yuan; Ouyang, Wenjuan; Chen, Gangcai Journal: Journal of geophysical research Issue: Volume 118:Issue 21(2013) Page Start: 12, 158 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗