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
- 33 more...
- ItemTRWahl0967 - Northern Pacific Log Car 122664, Bellingham, Washington, undated
- ItemTRWahl1063 - Northern Pacific Boxcar 8029, Bellingham, Washington, undated
- ItemTRWahl1064 - Northern Pacific Gondola 50650, Bellingham, Washington, undated
- ItemTRWahl1068 - Northern Pacific Boxcar 8080, Bellingham, Washington, undated
- ItemTRWahl1101 - Northern Pacific Covered Hopper Car 75311, Bellingham, Washington, undated