Michael, R. Bruce, author.
[Ann Arbor, Mich.] : Emission Control Technology Division, Office of Mobile Source Air Pollution Control, Office of Air, Noise, and Radiation, U.S. Environmental Protection Agency, August 1981.
1981-
Ashby, H. Anthony, author.
[Ann Arbor, Mich.] : Test and Evaluation Branch, Emission Control Technology Division, Office of Mobile Sources, U.S. Environmental Protection Agency, 1982.
1982
Becker, Janet, author.
[Ann Arbor, Mich.] : U.S. Environmental Protection Agency, Office of Air and Waste Management, Office of Mobile Source Air Pollution Control, Emission Control Technology Division, Characterization and Applications Branch, 1978.
1978