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., by United States. Congress. Senate. Committee on Interstate Commerce

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.
Author:	United States. Congress. Senate. Committee on Interstate Commerce
Note:	U.S. Government Printing Office, 1935

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Subject:	Railroads -- Communication systems -- Law and legislation -- United States
Subject:	Railroads -- Signaling -- Block system -- Law and legislation -- United States
Subject:	Railroads -- Signaling -- Interlocking systems
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