Annual report of block signals, automatic train control, and use of train orders; instructions and definitions.
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| Format: | Government Document Serial |
| Language: | English |
| Published: |
Washington :
U.S. GPO,
1929.
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| Online Access: | Connect to the full text of this electronic document |
| Published: | 1929. |
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| Item Description: | [for use in filing reports on railroad signals]. Record is based on bibliographic data in ProQuest U.S. Executive Branch Documents, 1910-1932. Reuse except for individual research requires license from ProQuest, LLC. Electronic resource. |
| Physical Description: | 1 online resource (volume) |
| Publication Frequency: | Annual |
| Format: | System requirements: PDF reader software. |