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
- 14 more...
- ItemTRWahl0378 - Northern Pacific Steam Locomotive 1361, Larson, Washington, undated
- ItemTRWahl0379 - Northern Pacific Steam Locomotive 1361, Larson, Washington, undated
- ItemTRWahl0381 - Northern Pacific Steam Locomotive 1913, Bellingham, Washington, undated
- ItemTRWahl0384 - Northern Pacific Steam Locomotive 1683, Bellingham, Washington, undated
- ItemTRWahl0385 - Northern Pacific Steam Locomotive 1683, Bellingham, Washington, undated
- ItemTRWahl0386 - Northern Pacific Steam Locomotive 1369, Bellingham, Washington, undated
- 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
- 73 more...