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Start Over You searched for: Year 1987 Remove constraint Year: 1987 Resource Type Polygon data Remove constraint Resource Type: Polygon data Creator Stackhouse, Cecil Remove constraint Creator: Stackhouse, Cecil

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1987. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the particulate... United States. Bureau of Transportation Statistics.