1991. U.S. Census Bureau. and GeoLytics, Inc. District boundaries for the 102nd United States Congress, Jan. 3, 1991 to Jan. 3, 1993. Harvard Geospatial Library.
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2010. U.S. Census Bureau. Geography Division. This polygon data layer represents the 2010 TIGER/Line Census 111th congressional districts for the United States. The TIGER/Line Files are shapefi...
2001. U.S. Census Bureau. Geography Division and Environmental Systems Research Institute (Redlands, Calif.). U.S. 107th Congressional Districts represents political boundaries for the U.S. 107th Congressional Districts. ESRI.
2003. Environmental Systems Research Institute (Redlands, Calif.). U.S. 108th Congressional Districts represents an interim version of the political boundaries for the U.S. 108th Congressional Districts. The U.S. C... ESRI.
Environmental Systems Research Institute (Redlands, Calif.). U.S. 109th Congressional Districts represents an interim version of the political boundaries for the U.S. 109th Congressional Districts. ESRI.
2010. U.S. Census Bureau. Geography Division. This polygon data layer represents the 2010 TIGER/Line census state legislative district (SLD) lower chambers for the United States. The TIGER/Line...
2010. U.S. Census Bureau. Geography Division. This polygon data layer represents the 2010 TIGER/Line census state legislative district (SLD) upper chambers for the United States. The TIGER/Line...