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- catalog contributor b7268887.
- catalog created "1936.".
- catalog date "1936".
- catalog date "1936.".
- catalog dateCopyrighted "1936.".
- catalog extent "iii, 39 p.".
- catalog issued "1936".
- catalog issued "1936.".
- catalog language "eng".
- catalog publisher "Washington, U. S. Govt. print. off.,".
- catalog spatial "United States.".
- catalog subject "Railroads Signaling United States.".
- catalog subject "TF615 .U65 1936".
- catalog title "Railway signal systems. Hearing before a subcommittee of the Committee on interstate and foreign commerce, Seventy-fourth Congress, second session, March 4, 1936.".
- catalog type "text".