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
- 385 more...
- 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
- ItemWWAGD-52-457 - Great Northern Diesel Locomotive 2524, undated
- ItemWWAGD-52-458 - Great Northern Diesel Locomotive 2527 at Denver, Colorado, 1970
- ItemWWAGD-52-459 - Great Northern Diesel Locomotive 2529, undated
- ItemWWAGD-52-460 - Great Northern Diesel Locomotive 3000 at Hillyard, Washington, 1968
- ItemWWAGD-52-461 - Great Northern Diesel Locomotive 3000, undated
- 23 more...