United States. Department of Transportation (1930). American Engineering Council Committee in Report on Street Traffic Sings, Signals and Markings. United States. Department of Transportation. https://doi.org/10.21949/1510326
United States. Department of Transportation. American Engineering Council Committee in Report on Street Traffic Sings, Signals and Markings. United States. Department of Transportation, 1930. https://doi.org/10.21949/1510326.
United States. Department of Transportation American Engineering Council Committee in Report on Street Traffic Sings, Signals and Markings. United States. Department of Transportation, 1930, ROSA P. https://doi.org/10.21949/1510326.
The report as modified has also been considered and approved by the Committee on Uniform Traffic Regulation of the National Conference on Street and Highway Safety. The report as revised will be considered by the Third National Conference on Street and Highway Safety to be held in Washington, May 27-28-29, 1930.
United States. Department of Transportation (1930). American Engineering Council Committee in Report on Street Traffic Sings, Signals and Markings. United States. Department of Transportation. https://doi.org/10.21949/1510326
United States. Department of Transportation. American Engineering Council Committee in Report on Street Traffic Sings, Signals and Markings. United States. Department of Transportation, 1930. https://doi.org/10.21949/1510326.
United States. Department of Transportation American Engineering Council Committee in Report on Street Traffic Sings, Signals and Markings. United States. Department of Transportation, 1930, ROSA P. https://doi.org/10.21949/1510326.
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