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2017 [2]
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Environmental considerations related to mining of nonfuel minerals [研究报告]
10.3133/pp1802BU.S. Geological Survey. 2017-01-01
Seal, Robert R. II rseal@usgs.gov;  Piatak, Nadine M. npiatak@usgs.gov;  Kimball, Bryn E. bekimball@usgs.gov;  Hammarstrom, Jane M. jhammars@usgs.gov
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Graphite [研究报告]
10.3133/pp1802JU.S. Geological Survey. 2017-01-01
Robinson, Gilpin R. Jr. grobinso@usgs.gov;  Hammarstrom, Jane M. jhammars@usgs.gov;  Olson, Donald W. dolson@usgs.gov
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