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2000. U.S. Census Bureau. Geography Division. This polygon shapefile represents the unified school district boundaries in Wyoming. School districts are geographic entities within which state, c... U.S. Census Bureau. Geography Division.
2001. Geological Survey (U.S.). This data set includes a selection of urban areas in the United States derived from the urban areas layer of the Digital Chart of the World (DCW). ... Geological Survey (U.S.).