Railroad Archives Online
- CollectionD0237A - Great Northern Railway Historical Society Cascade Division Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1012 - Cartographic materials
- Subseries Level 2001 - Railroads - Right of Way
- ItemGNRHSCD001 - Great Northern Interlockings, 1935
- ItemGNRHSCD005 - Great Northern Right of Way Map 34-19, New Westminster, British Columbia, circa 1945
- ItemGNRHSCD006 - Great Northern Right of Way Map 34-19, New Westminster, British Columbia, circa 1945
- ItemGNRHSCD020 - Great Northern Map of the Everett Vicinity, March 1936
- ItemGNRHSCD049 - Railroad Map of Spokane, Washington, circa 1957
- ItemGNRHSCD050 - Railroad Map of Spokane, Washington, circa 1957