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2000. U.S. Census Bureau. Geography Division. This polygon shapefile represents the elementary school district boundaries in Massachusetts. School districts are geographic entities within which... U.S. Census Bureau. Geography Division.
2000. U.S. Census Bureau. Geography Division. This polygon shapefile represents the 2000 U.S. Census secondary school district boundaries in Massachusetts. Secondary school districts provide ed... U.S. Census Bureau. Geography Division.
2007. U.S. Census Bureau. Geography Division and United States. Department of Commerce. This polygon shapefile contains state boundaries for the Northeastern United States The TIGER/Line Files are shapefiles and related database files ... United States. National Ocean Service.