1999. Department of Commerce, Census Bureau, Geography Division, Harvard Geospatial Library, and Environmental Systems Research Institute, Inc. (ESRI). U.S. 106th Congressional Districts represents political boundaries for the U.S. 106th Congressional Districts. Environmental Systems Research Institute, Inc. (ESRI).
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2000. United States Geological Survey, Harvard Geospatial Library, and Environmental Systems Research Institute, Inc. (ESRI). U.S. Geographic Names Information System School represents an automated inventory of the proper names and locations of physical and cultural geogra... Environmental Systems Research Institute, Inc. (ESRI).
1998. National Atlas of the United States and the United States Geological Survey, Harvard Geospatial Library, and Environmental Systems Research Institute, Inc. (ESRI). U.S. National Atlas Cities represents cities and towns in the United States. Environmental Systems Research Institute, Inc. (ESRI).
1990. Environmental Systems Research Institute, Inc. (ESRI) and Harvard Geospatial Library. U.S. Populated Place Points represents populated places within United States identified by the U.S. Bureau of the Census. Environmental Systems Research Institute, Inc. (ESRI).
1996. Environmental Systems Research Institute, Inc. (ESRI) and Harvard Geospatial Library. World Administrative Units 2000 represents the boundaries for the first-level administrative units of the world, as they existed in 2000. Environmental Systems Research Institute, Inc. (ESRI).
1996. Environmental Systems Research Institute, Inc. (ESRI) and Harvard Geospatial Library. World Countries 2000 represents the boundaries for the countries of the world, as they existed in 2000. Environmental Systems Research Institute, Inc. (ESRI).