Program and papers /

Eitemau Tebyg

• Highway construction and maintenance : proceedings of seminar P held at the PTRC Summer Annual Meeting, University of Warwick, England from 9 - 12 July 1979 /
  Cyhoeddwyd: (1979)
• Highway construction and maintenance : proceedings of Seminar F held at the PTRC Transport and Planning Summer Annual Meeting, University of Bath, England, from 7-11 September, 1987.
  Cyhoeddwyd: (1987)
• Proceedings of Seminar K held at the PTRC Transport and Planning Summer Annual Meeting : University of Sussex, England, from 10-14 September 1990.
  Cyhoeddwyd: (1990)
• Highway construction and maintenance : proceedings of Seminar K held at the PTRC Transport and Planning Summer Annual Meeting, University of Sussex, England, from 11-15 September, 1989.
  Cyhoeddwyd: (1989)
• Highway construction and maintenance : proceedings of Seminar S held at the PTRC Summer Annual Meeting, University of Sussex, England, from 14-17 July 1986.
  Cyhoeddwyd: (1986)