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Format
Shapefile
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Subject
Climatology, Meteorology and Atmosphere
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Subject
Air quality—Standards
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Institution
Stanford
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Year
1979
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1. Nonattainment Areas for Ozone Pollution: United States and Territories, 1979
1979. 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) ... United States. Bureau of Transportation Statistics.