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. Author manuscript; available in PMC: 2014 Jan 9.
Published in final edited form as: Atmos Environ (1994). 2012 Dec;63:250–260. doi: 10.1016/j.atmosenv.2012.09.045

Fig. 5.

Fig. 5

Change in relative UFP concentration with increasing distance from the freeway for parallel wind days and downwind days observed during the summer season compared with Zhu et al. (2002a).