Railroad Archives Online
- CollectionD0011 - James M. Fredrickson Collection
- Series008 - Union Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3011 - Railroad Cars Self-propelled
- ItemJMF13-05830.0 - Oregon Railroad and Navigation (Union Pacific Railroad) motor car number 1 at Dayton, Washington, undated.