American Association of State Highway and Transportation Officials. Subcommittee on Bridges and Structures, & American Association of State Highway and Transportation Officials. Subcommittee on Bridges and Structures. (1975). Standard specifications for structural supports for highway signs, luminaires and traffic signals. Washington: The Subcommittee.
Citación estilo ChicagoAmerican Association of State Highway and Transportation Officials. Subcommittee on Bridges and Structures, y American Association of State Highway and Transportation Officials. Subcommittee on Bridges and Structures. Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals. Washington: The Subcommittee, 1975.
Cita MLAAmerican Association of State Highway and Transportation Officials. Subcommittee on Bridges and Structures, y American Association of State Highway and Transportation Officials. Subcommittee on Bridges and Structures. Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals. Washington: The Subcommittee, 1975.