Policy assessment for the review of the secondary national ambient air quality standards for oxides of nitrogen and oxides of sulfur : January 14, 2011 version / [prepared by Office of Air Quality Planning and Standards].
- Research Triangle Park, N.C. : U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Health and Environmental Impacts Division, 2011.
- Government document
1 online resource ( pages) : color illustrations, maps
- Air quality -- Standards -- United States.
Atmospheric sulfur dioxide -- Standards -- United States.
Sulfur oxides -- Environmental aspects -- United States.
Atmospheric nitrogen oxides -- Standards -- United States.
Air quality management -- United States.
- "January 2011."
Title from title screen (viewed on Aug. 28, 2013).
GPO Cataloging Record Distribution Program (CRDP).
Includes bibliographical references.
- United States. Environmental Protection Agency. Health and Environmental Impacts Division. issuing body.
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