Planning and Transport Research and Computation (International) Co. Meeting Seminar P. & PTRC Education and Research Services Ltd. (1986). Road safety: Proceedings of Seminar P held at the PTRC Summer Annual Meeting, University of Sussex, England, from 14-17 July 1986. PTRC Education and Research Services Ltd. on behalf of Planning and Transport Research and Computation (International) Co. Ltd..

Planning and Transport Research and Computation (International) Co. Meeting Seminar P. and PTRC Education and Research Services Ltd. Road Safety: Proceedings of Seminar P Held at the PTRC Summer Annual Meeting, University of Sussex, England, from 14-17 July 1986. London: PTRC Education and Research Services Ltd. on behalf of Planning and Transport Research and Computation (International) Co. Ltd., 1986.

Planning and Transport Research and Computation (International) Co. Meeting Seminar P. and PTRC Education and Research Services Ltd. Road Safety: Proceedings of Seminar P Held at the PTRC Summer Annual Meeting, University of Sussex, England, from 14-17 July 1986. PTRC Education and Research Services Ltd. on behalf of Planning and Transport Research and Computation (International) Co. Ltd., 1986.