National Research Council. Highway Research Board. (1961). Urban transportation planning: Concepts and application : Presented at 40th annual meeting, January 9-13, 1961.
Dyfyniad Arddull ChicagoNational Research Council. Highway Research Board. Urban Transportation Planning: Concepts and Application : Presented at 40th Annual Meeting, January 9-13, 1961. Washington, D.C, 1961.
Dyfyniad MLANational Research Council. Highway Research Board. Urban Transportation Planning: Concepts and Application : Presented at 40th Annual Meeting, January 9-13, 1961. 1961.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.