Railroad Archives Online
- CollectionD0011 - James M. Fredrickson Collection
- Series008 - Union Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3001 - Bridges
- ItemJMF13-05840.1 - Union Pacific Railroad bridge at Spokane, Washington, undated.
- ItemJMF13-05840.2 - Union Pacific Railroad bridge at Spokane, Washington, undated.
- ItemJMF13-05840.3 - Union Pacific Railroad bridge at Spokane, Washington, undated.