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
- 169 more...
- 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
- ItemTRWahl0920 - Great Northern Diesel Locomotive 279A, Bellingham, Washington, undated
- ItemTRWahl0922 - Great Northern Diesel Locomotive 279A, Bellingham, Washington, undated
- ItemTRWahl0923 - Great Northern Diesel Locomotive 279A, Bellingham, Washington, undated
- ItemTRWahl0924 - Great Northern Diesel Locomotive 279A, Bellingham, Washington, undated
- ItemTRWahl0925 - Great Northern Diesel Locomotive 310A, Bellingham, Washington, undated
- 36 more...