1. Limitations for sulfur dioxide emissions from stationary sources;Air Pollution Board of the State of Indiana;Regulation APC 13,1976
2. A rail system optimization model for the transporation of coal;Chang,1979
3. An Introduction to Transportation Engineering;Hay,1967
4. Traffic estimation computer programs for educational purposes;Homburger,1970
5. Capacity restraint in assignment programs;Irwin;Transpn Res. Bull.,1961