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You searched for: Format Shapefile Remove constraint Format: Shapefile Access Public Remove constraint Access: Public Subject Climatology, Meteorology and Atmosphere Remove constraint Subject: Climatology, Meteorology and Atmosphere Subject Health Remove constraint Subject: Health Place United States Remove constraint Place: United States Place United States--Territories and possessions Remove constraint Place: United States--Territories and possessions
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1. Nonattainment Areas for Sulfur Dioxide Pollution, United States and Territories, 1978

1978. 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.