Railroad Archives Online
- CollectionE0357 - Wade J Stevenson Collection
- Series008 - Union Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3002 - Depots and Freighthouses
- ItemGNRHS.55.01.36 - Union Pacific Railroad Station Sign at Ayer, Washington, undated
- ItemGNRHS.55.01.37 - Union Pacific Depot at Ayer, Washington, undated
- ItemGNRHS.55.07.11 - Union Pacific Depot at Salt Lake City, Utah, undated
- ItemGNRHS.55.07.16 - Union Pacific Depot at Salt Lake City, Utah, undated