(1979). Portland study interim analysis: Observations on six months of vehicle operation. Emission Control Technology Division, Office of Mobile Source Air Pollution Control, Office of Air, Noise, and Radiation, United States Environmental Protection Agency.
Chicago Style (17th ed.) CitationPortland Study Interim Analysis: Observations on Six Months of Vehicle Operation. [Ann Arbor, Mich.]: Emission Control Technology Division, Office of Mobile Source Air Pollution Control, Office of Air, Noise, and Radiation, United States Environmental Protection Agency, 1979.
MLA (9th ed.) CitationPortland Study Interim Analysis: Observations on Six Months of Vehicle Operation. Emission Control Technology Division, Office of Mobile Source Air Pollution Control, Office of Air, Noise, and Radiation, United States Environmental Protection Agency, 1979.