Deregulation as a selective process : the agenda for reform in the U.S. bus and rail industries
The U.S. aviation system to the year 2000.
United States aviation system to the year 2000
The marketing of international air transportation in the USA
A systems dynamics model of the U.S. railroad industry.
Effect of fare and travel time on the demand for domestic air transportation
Economics and finance in the management of U.S. airports