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Start Over You searched for: Year 1997 Remove constraint Year: 1997 Place American Samoa Remove constraint Place: American Samoa Bounding Box -86.51116 39.149274 -86.508949 39.150938 Remove constraint Bounding Box: -86.51116 39.149274 -86.508949 39.150938

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1997. Stackhouse, Cecil and United States. Bureau of Transportation Statistics. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the ozone (O3) ... United States. Bureau of Transportation Statistics.