Railroad Archives Online
- FondoD0011 - James M. Fredrickson Collection
- Serie007 - Spokane, Portland, and Seattle Railway
- Sottoserie014 - Photographs
- 013 - Railroad Accidents
- Unità documentariaJMF16-06651.0 - A Spokane, Portland & Seattle Railway accident, undated.
- Unità documentariaJMF16-06651.1 - A Spokane, Portland & Seattle Railway accident, undated.