1. AAMA Motor Vehicle Facts & Figures,1993
2. Guidelines for Local Air Districts Considering Transportation Control Measures Directed at Heavy-Duty Truck Operations,1990
3. California Clean Air Act Transportation Requirements Guidance;Air Resources Board Office of Strategic Planning;California Clean Air Act Guidance Paper No. 2,1990
4. Air quality and travel behavior;Bae;J. Am. Plann. Assoc.,1993
5. A California and United States perspective on the impact of air quality policies on goods movement by heavy duty trucks;Boyd,1991