Tabulation of Statistics Pertaining to Signals, Interlocking, Automatic Train Control, and the Telegraph and the Telephone for Transmission of Train Orders, as Used on the Railroads of the United States, Jan. 1940.
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| Format: | Government Document eBook |
| Language: | English |
| Published: |
[Washington] :
[publisher not identified],
1940.
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| Online Access: | Electronic resource (PDF) |
| Item Description: | Includes tables and graphs. |
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| Physical Description: | 1 online resource (36 pages), digital, PDF file |