Railroad Archives Online
- CollectionD0237A - Great Northern Railway Historical Society Cascade Division Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1013 - Operations documents
- Subseries Level 2003 - Train orders
- ItemGNRHSCD016 - Great Northern Cascade Division Train Order, March 26, 1936
- ItemGNRHSCD057 - Great Northern Train Orders, Cascade Division, Washington, February 2, 1949
- ItemGNRHSCD322 - Great Northern Train Dispatcher's Order Book for the Cascade Division, April 1955.
- ItemGNRHSCD323 - Great Northern Cascade Division Dispatcher's Train Order Log Book, December 10, 1956