Planning and management of roads in developing countries : proceedings of Seminar L held at the PTRC Transport and Planning Summer Annual Meeting, University of Sussex, England, from 11-15 September, 1989.

Eitemau Tebyg

• Road deterioration in developing countries : proceedings of Seminar G held at the PTRC Transport and Planning Summer Annual Meeting, University of Bath, England, from 12-16 September 1988.
  Cyhoeddwyd: (1988)
• Developing countries : highways : proceedings of Seminar J held at the PTRC Summer Annual Meeting, University of Sussex, England, from 14-17 July 1986.
  Cyhoeddwyd: (1986)
• Developing countries : highway construction : proceedings of Seminar H held at the PTRC Transport and Planning Summer Annual Meeting, University of Bath, England, from 7-11 September 1987.
  Cyhoeddwyd: (1987)
• Highway design and maintenance in developing countries : proceedings of seminar F held at the PTRC Summer Annual Meeting, University of Warwick, England from 9 - 12 July, 1979 /
  Cyhoeddwyd: (1979)
• Highway design in developing countries : proceedings of the seminar on highway design in developing countries held during the PTRC Summer Annual Meeting, 10 - 11 July 1975, at the University of Warwick, England /
  Cyhoeddwyd: (1975)