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
- 346 more...
- ItemWWAGD-52-396 - Great Northern Diesel Locomotive 636, undated
- ItemWWAGD-52-397 - Great Northern Diesel Locomotive 644, undated
- ItemWWAGD-52-398 - Great Northern Diesel Locomotive 675 at Seattle, Washington, 1967
- ItemWWAGD-52-400 - Great Northern Diesel Locomotive 676, 1970
- ItemWWAGD-52-401 - Great Northern Diesel Locomotive 676 at Interbay, Washington, 1967
- ItemWWAGD-52-403 - Great Northern Diesel Locomotive 679 at Superior, Wisconsin, 1969
- ItemWWAGD-52-404 - Great Northern Diesel Locomotive 679 at Superior, Wisconsin, 1969
- ItemWWAGD-52-405 - Great Northern Diesel Locomotive 680 at Superior, Wisconsin, 1955
- ItemWWAGD-52-406 - Great Northern Diesel Locomotive 680, undated
- 62 more...