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Subject
Boundaries
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Subject
Administrative and political divisions
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Place
United States
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Data type
Polygon
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Year
1980
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1. County Boundaries of the United States, 1980
1980. Geological Survey (U.S.). This polygon shapefile contains the 1980 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).