Gompf, Henry L., author.
[Ann Arbor, Mich.] : Division of Motor Vehicle Research and Development, National Air Pollution Control Administration, [Department of Health, Education and Welfare], October 1970.
1970-
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-