Railroad Archives Online
- CollectionE0018 - Norm Keyes Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3001 - Steam Locomotives
- 991 more...
- Item40.S.97.10 - Great Northern Steam Locomotive 2505 at Fargo, North Dakota, 1955
- Item40.S.97.11 - Great Northern Steam Locomotive 2506 at Portland, Oregon, 1947
- Item40.S.97.12 - Great Northern Steam Locomotive 2500, 1923
- Item40.S.97.13 - Great Northern Steam Locomotive 2507 at Saint Paul, Minnesota, 1948
- Item40.S.97.14 - Great Northern Steam Locomotive 2508 at Whitefish, Montana, 1940
- Item40.S.97.15 - Great Northern Steam Locomotive 2510 at Whitefish, Montana, 1945
- Item40.S.97.16 - Great Northern Steam Locomotive 2510, undated
- Item40.S.97.17 - Great Northern Steam Locomotive 2510 at Whitefish, Montana, 1936
- Item40.S.97.18 - Great Northern Steam Locomotive 2511, undated
- 75 more...