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
- 27 more...
- ItemTRWahl0408 - Northern Pacific Steam Locomotive 1549, Bellingham, Washington, undated
- ItemTRWahl0409 - Northern Pacific Steam Locomotive 1683, Bellingham, Washington, undated
- ItemTRWahl0410 - Northern Pacific Steam Locomotive 1683, Bellingham, Washington, undated
- ItemTRWahl0413 - Northern Pacific Steam Locomotive 1369, Bellingham, Washington, undated
- ItemTRWahl0414 - Northern Pacific Steam Locomotive 1369, Bellingham, Washington, undated
- ItemTRWahl0415 - Northern Pacific Steam Locomotive 1369, Bellingham, Washington, undated
- ItemTRWahl0417 - Northern Pacific Steam Locomotive 1619, Bellingham, Washington, undated
- ItemTRWahl0419 - Northern Pacific Steam Locomotive 1619, Bellingham, Washington, undated
- ItemTRWahl0420 - Northern Pacific Steam Locomotive 1619, Bellingham, Washington, undated
- 60 more...