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
- 133 more...
- ItemTRWahl0787 - Great Northern Diesel Locomotive 214, Bellingham, Washington, undated
- ItemTRWahl0788 - Great Northern Diesel Locomotive 209, Bellingham, Washington, undated
- ItemTRWahl0789 - Great Northern Diesel Locomotive 224, Bellingham, Washington, undated
- ItemTRWahl0804 - Great Northern Diesel Locomotive 362A, Bellingham, Washington, undated
- ItemTRWahl0821 - Great Northern Diesel Locomotive 351A, Bellingham, Washington, undated
- ItemTRWahl0822 - Great Northern Diesel Locomotive 221, Bellingham, Washington, undated
- ItemTRWahl0823 - Great Northern Diesel Locomotive 310A, Bellingham, Washington, undated
- ItemTRWahl0826 - Great Northern Diesel Locomotive 456A, Skykomish, Washington, undated
- ItemTRWahl0827 - Great Northern Diesel Locomotive 251A, Bellingham, Washington, undated
- 72 more...