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Geological Survey (U.S.)
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Subject
Inland Waters
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Subject
Aquifers
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Place
United States Virgin Islands
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Puerto Rico
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Polygon
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1. Principal Aquifers of the 48 Conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands
2003. Geological Survey (U.S.). Water Resources Division. Wisconsin District. This polygon shapefile contains the shallowest principal aquifers of the conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islan... Geological Survey (U.S.).