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 3001 - Steam Locomotives
- ItemTRWahl0004 - Great Northern Steam Locomotive 3237, Bellingham, Washington, September 1949
- ItemTRWahl0217 - Great Northern Steam Locomotive 1246, Seattle, Washington, undated
- ItemTRWahl0218 - Great Northern Steam Locomotive 1246, Seattle, Washington, undated
- ItemTRWahl0219 - Great Northern Steam Locomotive 1246, Seattle, Washington, undated
- ItemTRWahl0443 - Great Northern Steam Locomotive 1371, Bellingham, Washington, undated
- 15 more...