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  1. Office of Transportation and Air Quality

    [Washington, D.C.] : U.S. Environmental Protection Agency, Office of Transportation and Air Quality, [2005]

    Online purl.fdlp.gov

  2. EPA issues notice of proposed rulemaking to establish a voluntary quality assurance program for verifying the validity of renewable identification numbers under the RFS program

    [Washington, D.C.] : United States Environmental Protection Agency, Office of Transportation and Air Quality, 2013.

    Online purl.fdlp.gov

  3. EPA proposed NOx emission standards for aircraft gas turbine engines

    [Washington, D.C.] : [U.S. Environmental Protection Agency, Office of Transportation and Air Quality], [2011]

    Online purl.fdlp.gov

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