Railroad Archives Online
- FondD0063 - Walter W. Ainsworth Collection
- Sorozat007 - Spokane, Portland, and Seattle Railway
- Alsorozat014 - Photographs
- 003 - Railroads--Buildings and Structures
- 004 - Maintenance of Way support
- IratdarabWWASPSL5-052 - Spokane, Portland, and Seattle (SP&S) tool house at Wishram, Washington, undated