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
- 164 more...
- ItemTRWahl0906 - Great Northern Diesel Locomotive, Bellingham, Washington, undated
- ItemTRWahl0907 - Great Northern Diesel Locomotive 500, Bellingham, Washington, undated
- ItemTRWahl0908 - Great Northern Diesel Locomotive 500, Bellingham, Washington, undated
- ItemTRWahl0909 - Great Northern Diesel Locomotive 115, Bellingham, Washington, undated
- ItemTRWahl0914 - Great Northern Diesel Locomotive 729, Bellingham, Washington, undated
- ItemTRWahl0915 - Great Northern Diesel Locomotive 729, Bellingham, Washington, undated
- ItemTRWahl0917 - Great Northern Diesel Locomotive 217, Bellingham, Washington, undated
- ItemTRWahl0918 - Great Northern Diesel Locomotive 353A, Bellingham, Washington, undated
- ItemTRWahl0919 - Great Northern Diesel Locomotive 353A, Bellingham, Washington, undated
- 41 more...