Verkehrsnetze: Investitionen in die Zukunft
Universal service obligations in a competitive telecommunications environment
Umwelt- und Sozialstandards für ein nachhaltiges Beschaffungsmanagement
Transport infrastructure investment : options for efficiency
Transport infrastructure and CO2 emissions in the OECD over the long run
Towards sustainable transportation
The future of international air transport policy : responding to global change
The future of international air transport policy : responding to global change
Telecommunication infrastructure : the benefits of competition