Design of sign supports and structures 6 reports.

Design of sign supports and structures 6 reports.

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 1971.
Cyfres:Highway research record no. 346.
Pynciau:
Traffic signs and signals > Break-away supports > Congresses.