• 9 Journals, Magazines, Newspapers
• 1 Microforms

• 5 Transportation
• 2 Energy policy
• 2 Power resources
• 1 Communication and traffic
• 1 Costa Rica. Ministerio de Transportes
• 1 European Conference of Ministers of Transport
• 1 Government policy
• 1 Local transit
• 1 Postal service
• 1 Spain. Ministerio de Transportes, Turismo y Comunicaciones
• 1 Telecommunication
• 1 Tourism
• 1 United States. Federal Transit Administration

• 2 European Commission. Directorate-General for Energy and Transport
• 1 Argentina. Secretaría de Estado de Obras Públicas y Transportes
• 1 Costa Rica. Ministerio de Transportes
• 1 Ethniko Metsovio Polytechneio (Greece)
• 1 European Conference of Ministers of Transport
• 1 European Conference of Ministers of Transports
• 1 Indonesia. Departemen Perhubungan. Pusat Komunikasi Publik
• 1 Spain. Ministerio de Transportes, Turismo y Comunicaciones
• 1 Spain. Ministerio de Transportes, Turismo y Comunicaciones. Servicio de Publicaciones
• 1 Spain. Ministerio de Transportes, Turismo y Comunicaciones. Subdirección General de Estudios
• 1 United States. Federal Transit Administration

• 5 English
• 3 Spanish
• 1 French
• 1 Indonesian

• 2 Europe
• 2 European Union countries
• 1 Argentina
• 1 Costa Rica
• 1 Indonesia
• 1 Spain
• 1 United States

• 2 Statistics

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