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...
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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.