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
- 22 more...
- ItemTRWahl0080 - Great Northern Diesel Locomotive 274B, Bellingham, Washington, undated
- ItemTRWahl0093 - Great Northern Diesel Locomotive 502, Bellingham, Washington, undated
- ItemTRWahl0094 - Great Northern Diesel Locomotive 273B, Bellingham, Washington, undated
- ItemTRWahl0095 - Great Northern Diesel Locomotive 500, Bellingham, Washington, undated
- ItemTRWahl0096 - Great Northern Diesel Locomotive 601, Bellingham, Washington, undated
- ItemTRWahl0097 - Great Northern Diesel Locomotive 602, Bellingham, Washington, undated
- ItemTRWahl0105 - Great Northern Diesel Locomotive 635, Bellingham, Washington, undated
- ItemTRWahl0106 - Great Northern Diesel Locomotive 635, Bellingham, Washington, undated
- ItemTRWahl0107 - Great Northern Diesel Locomotive, Bellingham, Washington, undated
- 183 more...