//-->
Transportation and traffic engineering handbook
Keefer, Louis E., (1982)
Ownership and efficiency in urban buses
Feibel, Charles, (1980)
Urban traffic : a function of land use
Mitchell, Robert Buchanan, (1974)
The Role of Advertising Costs in the Airline Industry
Kraft, Gerald,
The Effect of the Removal of the Firemen on Railroad Accidents, 1962-1967
Fisher, Franklin M., (1971)
The role of transportation in regional economic development : a Charles River Associates (Cambridge Mass.) research study
Kraft, Gerald, (1971)