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Compliance results Acid Rain Program.

Acid Rain Program (U.S.)
[Washington, D.C.] : U.S. Environmental Protection Agency, Office of Air and Radiation 1999

FY ... annual freedom of information report

United States. Environmental Protection Agency. Agency Freedom of Information Office.
[Washington, D.C.]: U.S. Environmental Protection Agency, Agency Freedom of Information Office 2004

Final regulatory impact analysis (RIA) for the SOb2s National Ambient Air Quality Standards (NAAQS)

Research Triangle Park, N.C. : U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Health and Environmental Impacts Division, Air Benefit-Cost Group, 2010. 2010