Railroad Archives Online
- FondsD0011 - James M. Fredrickson Collection
- Cyfres008 - Union Pacific Railroad Company
- Is-gyfres014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 001 - Steam Locomotives
- EitemJMF13-05710.0 - Union Pacific Railroad steam locomotive number 3181 at Tacoma, Washington in 1935.
- EitemJMF13-05711.0 - Union Pacific Railroad steam locomotive number 3203 at Portland, Oregon, undated.
- EitemJMF13-05712.0 - Union Pacific Railroad steam locomotive number 3203 at Tacoma, Washington in 1936.
- EitemJMF13-05713.0 - Union Pacific Railroad steam locomotive number 3223 at Tacoma, Washington in 1935.
- EitemJMF13-05713.1 - Union Pacific Railroad steam locomotive number 3224 at Bonneville, Oregon in 1939.
- 26 mwy...