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 3003 - Freight Cars
- 11 more...
- ItemTRWahl0266 - Northern Pacific Flat Car 121093, Arlington, Washington, undated
- ItemTRWahl0277 - Northern Pacific Boxcar 5413, Bellingham, Washington, undated
- ItemTRWahl0281 - Northern Pacific Boxcar 1006, Bellingham, Washington, undated
- ItemTRWahl0467 - Northern Pacific Gondola 53867, Bellingham, Washington, undated
- ItemTRWahl0468 - Northern Pacific Stock Car 83123, Bellingham, Washington, undated
- ItemTRWahl0525 - Northern Pacific Boxcar 5990, Bellingham, Washington, undated
- ItemTRWahl0581 - Northern Pacific Chip Car 118305, Bellingham, Washington, undated
- ItemTRWahl0585 - Northern Pacific Boxcar 5961, Bellingham, Washington, undated
- ItemTRWahl0592 - Northern Pacific Gondola 50584, Bellingham, Washington, undated
- 18 more...