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- The Survey ;3
- U.S. Geological Survey3
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- Canada Centre for Mapping1
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- Hart Energy Publishing1
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- National Geospatial Program, The National Map Small Scale1
- National Park Service1
- U.S. Census Bureau. Geography Division1
- U.S. Dept. of the Interior, U.S. Geological Survey ;1
- U.S. Geological Survey,1