Railroad Archives Online
- CollectionD0288 - Terence Wahl Collection
- Series007 - Spokane, Portland, and Seattle Railway
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3003 - Freight Cars
- ItemTRWahl0195 - Spokane, Portland and Seattle Flat Car 34078, Bellingham, Washington, undated
- ItemTRWahl0456 - Spokane, Portland and Seattle Boxcar 13415, Bellingham, Washington, undated
- ItemTRWahl0502 - Spokane, Portland and Seattle Boxcar 12183, Bellingham, Washington, undated
- ItemTRWahl0837 - Spokane, Portland and Seattle Flat Car 34199, Bellingham, Washington, undated
- ItemTRWahl0990 - Spokane, Portland and Seattle Boxcar 13192, Bellingham, Washington, undated