Highway sufficiency ratings presented at the 31st annual meeting, January 1952.

Highway sufficiency ratings presented at the 31st annual meeting, January 1952.

Manylion Llyfryddiaeth
Awdur Corfforaethol: National Research Council (U.S.). Highway Research Board
Fformat: Llyfr
Iaith:English
Cyhoeddwyd: Washington, D.C. The Board 1952.
Cyfres:Highway Research Board Bulletin53.
National Research Council. Publication 228.
Pynciau:
Traffic surveys > United States.
Roads > United States.