hearing, 75th Congress, 1st session, on H.R. 185, to promote safety of employees and travelers on railroads by requiring common carriers engaged in interstate commerce to install, inspect, test, repair, and maintain block-signal systems, interlocking, highway grade crossing protective devices, automate train-stop, train-control, cab-signal devices, and other appliances, methods, and systems intended to promote safety of railroad operations, Mar. 19, 1937 United States Congress. House. Committee on Interstate and Foreign Commerce. text dcu Washington, D.C.] 1937 monographic eng

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iii, 64 p. Document for sale by the Superintendent of Documents, paper. CRDP Program Historic Shelflist record. Railroads Safety appliances United States Railroads United States Safety measures Y 4.IN 8/4:SI 2/3 Y 4.IN 8/4:SI 2/3 GPO 100713 20170826152503.0 hsl000704655