United States Geological and Geographical Survey of the Territories

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1	PDF Document Add to Reading List Source URL: pubs.usgs.gov Language: English - Date: 2011-04-25 10:50:23 United States Geological and Geographical Survey of the Territories Geological Exploration of the Fortieth Parallel United States Land management Geological surveys United States Geological Survey Library A.D. Wilson Ferdinand Vandeveer Hayden United States National Park Service United States federal executive departments