Verkehrsnetze: Investitionen in die Zukunft
Urban Travel in East and West: Key Problems and a Framework for Action
Universal service obligations in a competitive telecommunications environment
Umwelt- und Sozialstandards für ein nachhaltiges Beschaffungsmanagement
Transport infrastructure investment : options for efficiency
Towards sustainable transportation
The Metro: An Essential Part of the Bucharest Public Transport System and its Future
The future of international air transport policy : responding to global change
The future of international air transport policy : responding to global change