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 2002 - Timetables
- ItemGNRHSCD058 - Great Northern Train Movements, Skykomish, Washington, February 1949
- ItemGNRHSCD251 - Great Northern Enginemen's Train Register, Appleyard, Washington, 1955
- ItemGNRHSCD343 - Great Northern Cascade Division Employee Timetable Number 103, April 25, 1965