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Geological Survey (U.S.)
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Countries
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Boundaries
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Stanford
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Year
2014
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1. 1:1,000,000-Scale National Boundaries of the United States, 2014
2014. Geological Survey (U.S.). This polygon shapefile contains the boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was created by extract... Geological Survey (U.S.).