Richardson, David, author.
[Ann Arbor, Mich.] : Technology Assessment and Evaluation Branch, Emission Control Technology Division, Office of Mobile Source Air Pollution Control, Office of Air, Noise and Radiation, U.S. Environmental Protection Agency, October, 1978.
1978-
Barth, Edward Anthony, author.
[Ann Arbor, Mich.] : Test and Evaluation Branch, Emission Control Technology Division, Office of Mobile Sources, U.S. Environmental Protection Agency, 1982.
1982