1. (A) Contour maps showing of the smoothed, log transformed distribution of arsenic. *Marks the putative source of pollution at
(A) Contour maps showing of the smoothed, log transformed distribution of arsenic. *Marks the putative source of pollution at (B) Contour maps showing of the smoothed, log transformed distribution of copper. *Marks the putative source of pollution at
F L R Williams, and S A Ogston Occup Environ Med 2002;59:2-8
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