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. 2017 Apr 14;24(16):14091–14103. doi: 10.1007/s11356-017-8944-2

Fig. 4.

Fig. 4

Principal component analysis (PCA) and cluster analysis of LREEs contents in analysed plant species collected from Area 1 and 2 (a and b) and Area 3 and 4 (c and d)