Railroad Archives Online
- CollectionD0288 - Terence Wahl Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3002 - Diesel Locomotives
- 123 more...
- ItemTRWahl0773 - Great Northern Diesel Locomotive 221, Bellingham, Washington, undated
- ItemTRWahl0774 - Great Northern Diesel Locomotive 230, Bellingham, Washington, undated
- ItemTRWahl0775 - Great Northern Diesel Locomotive 208, Bellingham, Washington, undated
- ItemTRWahl0777 - Great Northern Diesel Locomotive 279A, Bellingham, Washington, undated
- ItemTRWahl0778 - Great Northern Diesel Locomotive 279B, Bellingham, Washington, undated
- ItemTRWahl0780 - Great Northern Diesel Locomotive 359A, Bellingham, Washington, undated
- ItemTRWahl0781 - Great Northern Diesel Locomotive 502, Bellingham, Washington, undated
- ItemTRWahl0784 - Great Northern Diesel Locomotive 273A, Bellingham, Washington, undated
- ItemTRWahl0785 - Great Northern Diesel Locomotive 210, Bellingham, Washington, undated
- 82 more...