Penninga, Thomas J., author.
Ann Arbor, MI : Test and Evaluation Branch, Emission Control Technology Division, Office of Mobile Source Air Pollution Control, U.S. Environmental Protection Agency, 1981.
1981
[Ann Arbor, Mich.] : Technology Assessment and Evaluation Branch, Emission Control Technology Division, Office of Mobile Source Air Pollution Control, Environmental Protection Agency, 1974.
1974