Effects of traffic control devices presented at the 38th annual meeting, January 5-9, 1959.

Effects of traffic control devices presented at the 38th annual meeting, January 5-9, 1959.

Manylion Llyfryddiaeth
Awdur Corfforaethol: National Research Council (U.S.). Highway Research Board
Fformat: Llyfr
Iaith:English
Cyhoeddwyd: Washington, D.C. National Academy of Science - National Research Council 1960.
Cyfres:Publication (National Research Council (U.S.)) 730.
Bulletin (National Research Council (U.S.). Highway Research Board) 244.
Pynciau:
Traffic signs and signals.