You searched for: Subject Counties Remove constraint Subject: Counties Institution Stanford Remove constraint Institution: Stanford Place United States Remove constraint Place: United States Place Colorado Remove constraint Place: Colorado Year 1980 Remove constraint Year: 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.).