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
- 65 more...
- ItemTRWahl0598 - Northern Pacific Steam Locomotive 1549, Bellingham, Washington, undated
- ItemTRWahl0599 - Northern Pacific Steam Locomotive 1549, Bellingham, Washington, undated
- ItemTRWahl0606 - Northern Pacific Steam Locomotive 1672, Bellingham, Washington, undated
- ItemTRWahl0607 - Northern Pacific Steam Locomotive 1361, Bellingham, Washington, undated
- ItemTRWahl0608 - Northern Pacific Steam Locomotive 1672, Bellingham, Washington, undated
- ItemTRWahl0609 - Northern Pacific Steam Locomotive 1380, Bellingham, Washington, undated
- ItemTRWahl0610 - Northern Pacific Steam Locomotive 1380, Bellingham, Washington, undated
- ItemTRWahl0611 - Northern Pacific Steam Locomotive 1380, Bellingham, Washington, undated
- ItemTRWahl0612 - Northern Pacific Steam Locomotive 1691, Bellingham, Washington, undated
- 22 more...