European transport and roads : meeting the challenges of the 21st century : IRF Regional Conference, Lahti, Finland, 14-16 June 1999 : technical reports
European transport and roads : meeting the challenges of the 21st century : IRF Regional Conference, Lahti, Finland, 14-16 June 1999 : technical reports
European transport and roads : meeting the challenges of the 21st century : IRF Regional Conference, Lahti, Finland, 14-16 June 1999 : technical reports
European transport and roads : meeting the challenges of the 21st century : IRF Regional Conference, Lahti, Finland, 14-16 June 1999 : technical reports