Great Northern Railway Historical Society Blueprint Collection JSBP0373, Ardley, British Columbia, 1947. Great Northern Blueprint Number 190-105, Automatic Interlocking. Map Showing Signals. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Signal.
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Scope note(s)
At Pacific Northwest Railroad Archive, geographic drawings including maps, plats (cadastral maps) and track elevation (grade) profiles.
Source note(s)
LC Subject Authority Heading: Cartographic materials: http://id.loc.gov/authorities/subjects/sh00003498