Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3002 - Diesel Locomotives
- 380 more...
- ItemWWAGD-52-436 - Great Northern Diesel Locomotive 2020 at Chicago, Illinois, 1970
- ItemWWAGD-52-437 - Great Northern Diesel Locomotive 2031, 1968
- ItemWWAGD-52-450 - Great Northern Diesel Locomotive 2510, 1967
- ItemWWAGD-52-451 - Great Northern Diesel Locomotive 2519, 1967
- ItemWWAGD-52-452 - Great Northern Diesel Locomotive 2521, undated
- ItemWWAGD-52-453 - Great Northern Diesel Locomotive 2521, 1991
- ItemWWAGD-52-454 - Great Northern Diesel Locomotive 2522, 1969
- ItemWWAGD-52-455 - Great Northern Diesel Locomotive 2523, undated
- ItemWWAGD-52-456 - Great Northern Diesel Locomotive 2523, 1991
- 20 more...