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You searched for: Subject Boundaries Remove constraint Subject: Boundaries Subject Administrative and political divisions Remove constraint Subject: Administrative and political divisions Place United States Remove constraint Place: United States Year 1990 Remove constraint Year: 1990
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1. County Boundaries of the United States, 1990

1990. Geological Survey (U.S.). This polygon shapefile portrays the 1990 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).