Railroad Archives Online
- D0237A - Great Northern Railway Historical Society Cascade Division Collection
- Ro`yxat003 - Great Northern Railway Company (U.S.)
- Ro`yxat-osti013 - Operations documents
- 003 - Train orders
- GNRHSCD016 - Great Northern Cascade Division Train Order, March 26, 1936
- GNRHSCD057 - Great Northern Train Orders, Cascade Division, Washington, February 2, 1949
- GNRHSCD322 - Great Northern Train Dispatcher's Order Book for the Cascade Division, April 1955.
- GNRHSCD323 - Great Northern Cascade Division Dispatcher's Train Order Log Book, December 10, 1956