[Ann Arbor, Mich.] : Environmental Protection Agency, Office of Mobile Source Air Pollution Control, Emission Control Technology Division, Technology Assessment and Evaluation Branch, 1975.
1975
[Ann Arbor, Mich.] : Environmental Protection Agency, Office of Air and Waste Management, Emission Control Technology Division, Technology Assessment and Evaluation Branch, [1976]
1976
[Ann Arbor, Mich.] : Emission Control Engineering Branch, Division of Motor Vehicle Pollution Control, National Air Pollution Control Administration, Department of Health, Education, and Welfare, 1968.
1968