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- catalog contributor b7268642.
- catalog created "1935.".
- catalog date "1935".
- catalog date "1935.".
- catalog dateCopyrighted "1935.".
- catalog extent "iii, 58 p. incl. tables.".
- catalog issued "1935".
- catalog issued "1935.".
- catalog language "eng".
- catalog publisher "Washington, U.S. Govt. Print. Off.,".
- catalog subject "625.16".
- catalog subject "Railroads Signaling Block system.".
- catalog subject "Railroads Signaling Interlocking systems.".
- catalog subject "TF630 .U6 1935".
- catalog title "Railroad block-signal systems. Hearings before a subcommittee of the Committee on Interstate Commerce, United States Senate, Seventy-fourth Congress, first session, on S. 1288, a bill to promote the 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, and other appliances, methods, and systems intended to promote the safety of railroad operation. July 9 and 10, 1935 ...".
- catalog type "text".