Analysis of technical issues relating to : California's request for waiver of federal preemption with respect to optional 100,000-mile exhaust emission standards and test procedures for 1980 and subsequent model year light-duty vehicles and 1981 and subsequent model year light-duty trucks and medium-duty vehicles
[Ann Arbor, Mich.] : Standards Development and Support Branch, Emission Control Technology Division, Office of Mobile Source Air Pollution Control, Office of Air, Noise and Radiation, U.S. Environmental Protection Agency, December 5, 1979