Traffic survey :
hearings before the Subcommittee on Streets and Traffic of the Committee on the District of Columbia, House of Representatives, Seventy-fourth Congress, second session, relative to traffic conditions in the District of Columbia, February 3, 4, 6, 7, 11, 12, 25, 28, March 3, 4, 6, 7, 10, 12, 13, and 30, 1936.

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Full view   University of Minnesota