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U.S. Geological Survey

  Link Details for: U.S. Geological Survey
Link Title: U.S. Geological Survey Open in a new window
Link URL: http://www.usgs.gov/
Link Details: The U.S. Geological Survey provides the Nation with reliable, impartial information to describe and understand the Earth.
Category: Top : Science : Earth_Sciences : Geomatics : Land_Surveying : National_Resources
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U.S. Geological Survey