(1977). Highway maintenance: Proceedings of the Seminar of highway maintenance held from Wednesday 29-Thursday 30 June 1977 during the PTRC Summer Annual Meeting and the University of Warwick, England. Warwick: Planning and Transport Research and ComputationPTRC Education and Research Services.
Παραπομπή Chicago StyleHighway Maintenance: Proceedings of the Seminar of Highway Maintenance Held From Wednesday 29-Thursday 30 June 1977 During the PTRC Summer Annual Meeting and the University of Warwick, England. Warwick: Planning and Transport Research and ComputationPTRC Education and Research Services, 1977.
Παραπομπή MLAHighway Maintenance: Proceedings of the Seminar of Highway Maintenance Held From Wednesday 29-Thursday 30 June 1977 During the PTRC Summer Annual Meeting and the University of Warwick, England. Warwick: Planning and Transport Research and ComputationPTRC Education and Research Services, 1977.