ProQuest U.S. Congressional Hearings Digital Collection.
Railway Signal Systems : hearings before the United States House Committee on Interstate and Foreign Commerce, Seventy-Fifth Congress, first session, on Mar. 19, 1937.
Washington : U.S. G.P.O., 1937.
iii, 64 pages ; cm
Considers legislation to require railroads to install and maintain block-signal systems, interlocking highway grade crossing protective barriers, automatic train stop and train controls, cab signal devices and other safety systems. Considers (75) H.R. 185.
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Print version: United States. Congress. House. Committee on Interstate and Foreign Commerce. Railway Signal Systems. Microfiche version: United States. Congress. House. Committee on Interstate and Foreign Commerce. Railway Signal Systems. [Bethesda, Md.] : LexisNexis Academic & Library Solutions,