Traffic signals 5 reports ; prepared for the 52nd annual meeting.

Traffic signals 5 reports ; prepared for the 52nd annual meeting.

Xehetasun bibliografikoak
Erakunde egilea: National Research Council (U.S.). Highway Research Board
Formatua: Liburua
Hizkuntza:English
Argitaratua: Washington, D.C. Highway Research Board, National Research Council 1973.
Saila:Highway research record no. 445.
Gaiak:
Traffic signs and signals.
Electronic traffic controls.