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Washington : U.S. G.P.O., 2012.
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United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Environment and Hazardous Materials.
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2008.
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Research Triangle Park, NC : U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Air Quality Assessment Division, 2011.
2011