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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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.
1972. Geological Survey (U.S.) and Environmental Systems Research Institute (Redlands, Calif.). U.S. National Atlas Public Land Survey represents the Public Land Surveys (for example, donation lands, land grants, private and public lands) of t... ESRI.
1996. Environmental Systems Research Institute (Redlands, Calif.). World Administrative Units represents the boundaries for the first-level administrative units of the world. 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.
Geological Survey (U.S.) and Environmental Systems Research Institute (Redlands, Calif.). U.S. National Atlas Public Land Survey represents the Public Land Surveys (for example, donation lands, land grants, private and public lands) of t... ESRI.
1996. Environmental Systems Research Institute (Redlands, Calif.). World Administrative Units represents the boundaries for the first-level administrative units of the world. ESRI.
2002. Environmental Systems Research Institute (Redlands, Calif.), Geological Survey (U.S), and American Geological Institute. This datalayer is a polygon coverage representing First-Order Administrative Areas worldwide (as they existed in 2002) and was originally produced ... American Geological Institute.
2000. Oak Ridge National Laboratory. The LandScan 2000 global population data set is a worldwide population database compiled on a 30" X 30" latitude/longitude grid. Census counts (at ... Oak Ridge National Laboratory.