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U.S. Department of the Interior U.S. Geological Survey Effects of Coal-Mine Drainage on Stream Water Quality in the Allegheny and Monongahela River Basins—
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Document Date: 2003-03-04 16:34:28
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File Size: 2,13 MB
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U.S. Department of the Interior U.S. Geological Survey Effects of Coal-Mine Drainage on Stream Water Quality in the Allegheny and Monongahela River Basins—