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. 2012 Dec 18;20(6):4154–4163. doi: 10.1007/s11356-012-1315-0

Fig. 5.

Fig. 5

Cluster analysis results a with regard to the air temperature and relative humidity in Gdynia (17.XII.2007–17.XII.2008), as well as b benzo(a)pyrene concentrations, c temperature, and d humidity in groups distinguished by the analysis