Citations
"Regulations for Train Signalling on Double Lines of Railway by the Absolute Block System, by the Permissive Block System, also General Instructions to Signalmen", 1947, GBR/3296/Maps/Maps.RLY.Z.5 (3), Maps.RLY.Z.5 (3). Cambridge University Library. |
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"Regulations for Train Signalling on Double Lines of Railway by the Absolute Block System, by the Permissive Block System, also General Instructions to Signalmen", 1947, GBR/3296/Maps/Maps.RLY.Z.5 (3), Maps.RLY.Z.5 (3). Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/268272 Accessed June 23, 2024. |