National Research Council (U.S.). Transportation Research Board, Planning and Transport Research and Computation (International) Co, Planning and Transport Research and Computation (International) Co. Meeting, & Cox, B. E. (1979). Highway construction and maintenance: Proceedings of seminar P held at the PTRC Summer Annual Meeting, University of Warwick, England from 9 - 12 July 1979. PTRC Education and Research Services on behalf of Planning and Transport Research and Computation (International) Co..

National Research Council (U.S.). Transportation Research Board, Planning and Transport Research and Computation (International) Co, Planning and Transport Research and Computation (International) Co. Meeting, and B. E. Cox. Highway Construction and Maintenance: Proceedings of Seminar P Held at the PTRC Summer Annual Meeting, University of Warwick, England from 9 - 12 July 1979. London: PTRC Education and Research Services on behalf of Planning and Transport Research and Computation (International) Co., 1979.

National Research Council (U.S.). Transportation Research Board, et al. Highway Construction and Maintenance: Proceedings of Seminar P Held at the PTRC Summer Annual Meeting, University of Warwick, England from 9 - 12 July 1979. PTRC Education and Research Services on behalf of Planning and Transport Research and Computation (International) Co., 1979.