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. 2021 Oct 26;44(11):3799–3819. doi: 10.1007/s10653-021-01131-6

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© The Author(s) 2021

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Fig. 3 — Location of private houses and voluntary residents providing both human hair and well water samples. The map of the Precambrian bedrock is based on the database of the Geological Survey of Finland (Bedrock of Finland—Digi KP)