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United States. Bureau of Transportation Statistics
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Subject
Boundaries
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Institution
Stanford
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American Samoa
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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.
2. Nonattainment Areas for Nitrogen Dioxide Pollution: United States and Territories, 1971
1971. Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the nitrogen di... United States. Bureau of Transportation Statistics.
3. Nonattainment Areas for Sulfur Dioxide 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 sulfur diox... United States. Bureau of Transportation Statistics.