Traffic research problem statements presented at the 31st annual meeting, January 14-18, 1952.

Traffic research problem statements presented at the 31st annual meeting, January 14-18, 1952.

Sonraí bibleagrafaíochta
Údar corparáideach: National Research Council (U.S.). Highway Research Board
Formáid: LEABHAR
Teanga:English
Foilsithe / Cruthaithe: Washington, D.C. Highway Research Board 1952.
Ábhair:
Traffic regulations > Congresses.