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
- 366 more...
- ItemWWAGD-52-420 - Great Northern Diesel Locomotive 721 at Seattle, Washington, 1961
- ItemWWAGD-52-421 - Great Northern Diesel Locomotive 723 at Monroe, Washington, 1968
- ItemWWAGD-52-424 - Great Northern Diesel Locomotive 724, undated
- ItemWWAGD-52-425 - Great Northern Diesel Locomotive 726, undated
- ItemWWAGD-52-426 - Great Northern Diesel Locomotive 731, undated
- ItemWWAGD-52-427 - Great Northern Diesel Locomotive 900, undated
- ItemWWAGD-52-428 - Great Northern Diesel Locomotive 902, 1966
- ItemWWAGD-52-429 - Great Northern Diesel Locomotive 905, undated
- ItemWWAGD-52-430 - Great Northern Diesel Locomotive 908 at Minneapolis Junction, Minnesota, 1970
- 42 more...