MINISTRY OF DEVELOPMENT
http://www.mfom.es

MINISTRY OF THE ENVIRONMENT
http://www.mam.es

GIF - Gestor de Infraestructuras Ferroviarias
http://www.gif.es

RENFE
http://www.renfe.es

SEOPAN (National Association of Spanish Construction Companies)
http://www.seopan.es

SCHOOL OF CIVIL ENGINEERS
http://www.caminos.upm.es