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. Author manuscript; available in PMC: 2013 Oct 29.
Published in final edited form as: Atmos Environ (1994). 2010 Dec 1;44(39):5737–5743. doi: 10.1016/j.atmosenv.2010.08.042

Fig. 2.

Fig. 2

Composition profile of PAHs from residential coal combustion (A) and relative distribution of 4 groups with different PAHs rings for each coal (B).