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1.
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Research Triangle Park, N.C. : Information Transfer and Program Integration Division (ITPID), Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency, [1998]
EP 4.2: AE 8/2 |
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2.
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Research Triangle Park, N.C. : Information Transfer and Program Integration Division (ITPID), Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency, [1997]
EP 4.2: W 85/3 |
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3.
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Research Triangle Park, N.C. : U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, [1997]
EP 4.2: R 26/5 |
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4.
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Research Triangle Park, N.C. : Office of Air Quality and Planning Standards, Office of Air and Radiation, U.S. Environmental Protection Agency, [1997]
EP 4.2: M 53/2 |
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5.
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Research Triangle Park, N.C. : U.S. Environmental Protection Agency, Office of Air and Radiation, Office of Air Quality Planning and Standards, [1993]
EP 4.8: |
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6.
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Research Triangle Park, N.C. : U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, [1995]
EP 4.2: SU 6 |
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7.
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Research Triangle Park, NC : U.S. Environmental Protection Agency, Office of Air and Radiation, Office of Air Quality Planning and Standards, [1996]
EP 4.2: C 42/5 |
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8.
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Research Triangle Park, N.C. : Monitoring and Quality Assurance Group, Emissions, Monitoring, and Analysis Division, U.S. Environmental Protection Agency, [1998]
EP 4.8: SI 1 |
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9.
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[Ann Arbor, MI?] : U.S. Environmental Protection Agency, Air and Radiation, Office of Mobile Sources, [1999]
EP 4.2: T 68/5 |
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10.
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[Cambridge, Mass.] : Taubman Center for State and Local Government, John F. Kennedy School of Government, Harvard University, [1999]
EP 4.2: T 68/6 |
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