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

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

Sonraí bibleagrafaíochta
Údar corparáideach: National Research Council (U.S.). Highway Research Board
Formáid: LEABHAR
Teanga:English
Foilsithe / Cruthaithe: Washington, D.C. The Board 1952.
Sraith:Highway Research Board Bulletin53.
National Research Council. Publication 228.
Ábhair:
Traffic surveys > United States.
Roads > United States.