Railroad Archives Online
- CollectionD0011 - James M. Fredrickson Collection
- Series007 - Spokane, Portland, and Seattle Railway
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3006 - Cabooses (Railroads)
- ItemJMF16-06652.0 - Spokane, Portland & Seattle Railway caboose number 10029, undated.