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2. EIA, 2001. Refiner motor gasoline volumes by grade, sales type, PAD district, and state (Table 43). Petroleum Marketing Monthly. US Energy Information Administration, Department of Energy, Washington, DC, 2001.
3. EPA, 1994. User's guide to MOBILE5 (Mobile Source Emission Factor Model). Office of Mobile Sources, Office of Air and Radiation, EPA-AA-TEB-94-01, Ann Arbor, MI, May 1994.
4. EPA, 2001. National air quality and emission trends report, 1999. EPA-454/R-01-004, Office of Air Quality Planning and Standards, Research Triangle Park, NC, March 2001.
5. EPA, 2002. User's guide to MOBILE6 (Mobile Source Emission Factor Model). Office of Mobile Sources, Office of Air and Radiation, EPA420-R-02-001, Ann Arbor, MI, January 2002.