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
- 91 more...
- ItemTRWahl0433 - Great Northern Diesel Locomotive 602, Bellingham, Washington, undated
- ItemTRWahl0435 - Great Northern Diesel Locomotive, Seattle, Washington, undated
- ItemTRWahl0442 - Great Northern Diesel Locomotive 510, Bellingham, Washington, undated
- ItemTRWahl0458 - Great Northern Diesel Locomotive 610, Bellingham, Washington, undated
- ItemTRWahl0459 - Great Northern Diesel Locomotive 273B, Bellingham, Washington, undated
- ItemTRWahl0463 - Great Northern Diesel Locomotive 281A, Bellingham, Washington, undated
- ItemTRWahl0472 - Great Northern Diesel Locomotive 505, Bellingham, Washington, undated
- ItemTRWahl0477 - Great Northern Diesel Locomotive 376, Bellingham, Washington, undated
- ItemTRWahl0491 - Great Northern Diesel Locomotive 274A, Bellingham, Washington, undated
- 114 more...