(1978). Highway maintenance: Proceedings of the Seminar of highway maintenance held on Wednesday 12 and Thursday 13 July 1978 during the PTRC Summer Annual Meeting at the University of Warwick, England. Warwick: Planning and Transport Research and Computation PTRC Education and Research Services.
Παραπομπή Chicago StyleHighway Maintenance: Proceedings of the Seminar of Highway Maintenance Held On Wednesday 12 and Thursday 13 July 1978 During the PTRC Summer Annual Meeting At the University of Warwick, England. Warwick: Planning and Transport Research and Computation PTRC Education and Research Services, 1978.
Παραπομπή MLAHighway Maintenance: Proceedings of the Seminar of Highway Maintenance Held On Wednesday 12 and Thursday 13 July 1978 During the PTRC Summer Annual Meeting At the University of Warwick, England. Warwick: Planning and Transport Research and Computation PTRC Education and Research Services, 1978.