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3. Air Quality Management in the United States; National Research Council, The National Academy Press: Washington, DC, 2004.
4. Air Quality Criteria for Ozone and Related Photochemical Oxidants; EPA-600/AP-93/004aF-Cf; U.S. Environmental Protection Agency: Washington, DC, 1996.
5. Air Quality Criteria for Particulate Matter; EPA/600/P-99/002aF-bF; U.S. Environmental Protection Agency, U.S. Government Printing Office: Washington, DC, 2004.