You searched for: Subject Administrative and political divisions Remove constraint Subject: Administrative and political divisions Subject Counties Remove constraint Subject: Counties Institution Stanford Remove constraint Institution: Stanford Place Puerto Rico Remove constraint Place: Puerto Rico Year 1990 Remove constraint Year: 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.).