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
- 66 more...
- ItemTRWahl0317 - Great Northern Diesel Locomotive 136, Bellingham, Washington, undated
- ItemTRWahl0318 - Great Northern Diesel Locomotive 160, Bellingham, Washington, undated
- ItemTRWahl0319 - Great Northern Diesel Locomotive 160, Bellingham, Washington, undated
- ItemTRWahl0324 - Great Northern Diesel Locomotive 606, Bellingham, Washington, undated
- ItemTRWahl0325 - Great Northern Diesel Locomotive 606, Bellingham, Washington, undated
- ItemTRWahl0326 - Great Northern Diesel Locomotive 606, Bellingham, Washington, undated
- ItemTRWahl0328 - Great Northern Diesel Locomotive 606, Bellingham, Washington, undated
- ItemTRWahl0329 - Great Northern Diesel Locomotive 606, Bellingham, Washington, undated
- ItemTRWahl0330 - Great Northern Diesel Locomotive 606, Bellingham, Washington, undated
- 139 more...