Railroad Archives Online
- CollectionD0288 - Terence Wahl Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3001 - Steam Locomotives
- 20 more...
- ItemTRWahl0387 - Northern Pacific Steam Locomotive 1683, Bellingham, Washington, undated
- ItemTRWahl0388 - Northern Pacific Steam Locomotive 1683, Bellingham, Washington, undated
- ItemTRWahl0402 - Northern Pacific Steam Locomotive 1361, Larson, Washington, undated
- ItemTRWahl0403 - Northern Pacific Steam Locomotive 1361, Larson, Washington, undated
- ItemTRWahl0404 - Northern Pacific Steam Locomotive 1361, Larson, Washington, undated
- ItemTRWahl0405 - Northern Pacific Steam Locomotive 1361, Larson, Washington, undated
- ItemTRWahl0407 - Northern Pacific Steam Locomotive 1361, Bellingham, Washington, undated
- ItemTRWahl0408 - Northern Pacific Steam Locomotive 1549, Bellingham, Washington, undated
- ItemTRWahl0409 - Northern Pacific Steam Locomotive 1683, Bellingham, Washington, undated
- 67 more...