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Publisher
United States. Bureau of Transportation Statistics
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Subject
Air quality
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Subject
Carbon monoxide
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Institution
Stanford
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Place
Puerto Rico
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Place
United States Virgin Islands
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Year
1971
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1. Nonattainment Areas for Carbon Monoxide Pollution: United States and Territories, 1971
1971. 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 carbon mono... United States. Bureau of Transportation Statistics.