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      Cover image for Geochemical Exploration Near the Getchell Mine, Humboldt County, Nevada
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      Geochemical Exploration Near the Getchell Mine, Humboldt County, Nevada

      Ralph Leroy Erickson,A P Marranzino

      The United States Geological Survey (USGS) is a scientific organization created in 1879, and is part of the U.S. government. Their scientists explore our environment and ecosystems, to determine the…

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