Railroad Archives Online
- CollectionD0036 - George Werkema Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3002 - Diesel Locomotives
- 159 more...
- Itemimg397 - Great Northern Diesel Locomotive 251A at Skykomish, Washington, undated
- Itemimg398 - Great Northern Diesel Locomotive at Baring, Washington, 1968
- Itemimg4 - Great Northern Diesel Locomotive 81 at Seattle, Washington, 1973
- Itemimg40 - Great Northern Diesel Locomotive 359C at Minneapolis, Minnesota, 1969
- Itemimg400 - Great Northern Diesel Locomotive 502 at Everett, Washington, 1954
- Itemimg401 - Great Northern Diesel Locomotive 682 at Lewistown, Montana, 1965
- Itemimg402 - Great Northern Diesel Locomotive 682 at Lewistown, Montana, 1965
- Itemimg403 - Great Northern Diesel Locomotive 682 at Spring Creek Jct., Montana, 1965
- Itemimg404 - Great Northern Diesel Locomotive 682 at Spring Creek Jct., Montana, 1965
- 60 more...