Austin, Thomas C., author.
[Ann Arbor, Mich.] : Test and Evaluation Branch, Division of Emission Control Technology, Mobile Source Pollution Control Program, Environmental Protection Agency, December 1971.
1971-
Austin, Thomas C., author.
[Ann Arbor, Mich.] : Test and Evaluation Branch, Mobile Source Pollution Control Program, Environmental Protection Agency, April 1972.
1972-