National Research Council (U.S.). Transportation Research Board. Meeting. (2000). Pavement management and monitoring. National Academy Press.
Dyfyniad Arddull ChicagoNational Research Council (U.S.). Transportation Research Board. Meeting. Pavement Management and Monitoring. Washington, D.C: National Academy Press, 2000.
Dyfyniad MLANational Research Council (U.S.). Transportation Research Board. Meeting. Pavement Management and Monitoring. National Academy Press, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.