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. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: Atmos Environ (1994). 2015 Feb 24;109:61–69. doi: 10.1016/j.atmosenv.2015.02.056

Figure 2.

Figure 2

Ozone and formaldehyde concentrations as a function of nitrogen oxide concentration, Beijing, China, June to October 2008.