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
- 52 more...
- ItemTRWahl0516 - Northern Pacific Steam Locomotive 684, Bellingham, Washington, undated
- ItemTRWahl0519 - Northern Pacific Steam Locomotive 1549, Bellingham, Washington, undated
- ItemTRWahl0520 - Northern Pacific Steam Locomotive 1549, Bellingham, Washington, undated
- ItemTRWahl0521 - Northern Pacific Steam Locomotive 1549, Bellingham, Washington, undated
- ItemTRWahl0582 - Northern Pacific Steam Locomotive 1369, Bellingham, Washington, undated
- ItemTRWahl0583 - Northern Pacific Steam Locomotive 1369, Bellingham, Washington, undated
- ItemTRWahl0584 - Northern Pacific Steam Locomotive 1369, Bellingham, Washington, undated
- ItemTRWahl0586 - Northern Pacific Steam Locomotive 1691, Bellingham, Washington, undated
- ItemTRWahl0587 - Northern Pacific Steam Locomotive 1691, Bellingham, Washington, undated
- 35 more...