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Publisher
United States. Bureau of Transportation Statistics
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Subject
Air quality—Standards
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Subject
Ozone
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Institution
Stanford
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Place
Washington (D.C.)
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Year
1990
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1 entry found
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1. Nonattainment Areas for Ozone Pollution: United States and Territories, 1990
1990. 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 ozone (O3)1... United States. Bureau of Transportation Statistics.