Railroad Archives Online
- CollectionD0018 - Robert E. Kelly Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1012 - Cartographic materials
- Subseries Level 2W2018-71-003 - Track profile
- 36 more...
- ItemW2018-71-256 - Great Northern Railway Track Profile Mileposts 2-22, Entiat, Washington, 1949
- ItemW2018-71-257 - Great Northern Railway Track Profile Mileposts 125-136, Cordell, Washington
- ItemW2018-71-258 - Great Northern Railway Track Profile Mileposts 161-203, Hedley, British Columbia
- ItemW2018-71-259 - Great Northern Railway Track Profile Mileposts 22-41, Stayman, Washington
- ItemW2018-71-260 - Great Northern Railway Track Profile 135-144, Nighthawk, Washington
- ItemW2018-71-261 - Great Northern Railway Track Profile Mileposts 64-77, Chief Joseph, Washington
- ItemW2018-71-262 - Great Northern Railway Track Profile Mileposts 104-122, Janis, Washington
- ItemW2018-71-263 - Great Northern Railway Track Profile Mileposts 21-40, Stayman, Washington
- ItemW2018-71-264 - Great Northern Railway Track Profile Mileposts 78-104, Okanogan, Washington