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. 2023 Jan 20;195(2):312. doi: 10.1007/s10661-023-10932-4

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Fig. 3 — Box plots showing the mean total contents of potentially toxic elements in the investigated sites. Error bars indicate the standard deviation of samples. (FS, forest soil; URS, underground rock mine spoil; OXS, oxide mine spoil; AVS, alluvial mine spoil)