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
- 97 more...
- 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
- ItemTRWahl0543 - Great Northern Diesel Locomotive 501, Bellingham, Washington, undated
- ItemTRWahl0548 - Great Northern Diesel Locomotive 511, South Bellingham, Washington, undated
- ItemTRWahl0562 - Great Northern Diesel Locomotive 613, Bellingham, Washington, undated
- ItemTRWahl0656 - Great Northern Diesel Locomotive 634, Bellingham, Washington, undated
- ItemTRWahl0663 - Great Northern Diesel Locomotive 1629, Bellingham, Washington, undated
- ItemTRWahl0684 - Great Northern Diesel Locomotive, Bellingham, Washington, undated
- 108 more...