Smuda, Bill, author.
Ann Arbor, Michigan : Emission Control Technology Division, Office of Mobile Source Air Pollution Control, U.S. Environmental Protection Agency, 1980.
1980
Ashby, H. Anthony, author.
[Ann Arbor, Mich.] : Division of Motor Vehicle Research and Development, National Air Pollution Control Administration, Department of Health, Education, and Welfare, July 1970.
1970-