Railroad Archives Online
- CollectionD0011 - James M. Fredrickson Collection
- Series006 - Southern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3001 - Steam Locomotives
- 8 more...
- ItemJMF15-06708.0 - Southern Pacific Railroad steam locomotive number 4451 at Santa Barbara, California in 1947.
- ItemJMF15-06709.0 - Southern Pacific Railroad steam locomotive number 4451 at Santa Barbara, California in 1947.
- ItemJMF15-06710.0 - Southern Pacific Railroad steam locomotive number 4449 at San Francisco, California in 1953.
- ItemJMF15-06847.0 - Southern Pacific Railroad steam locomotive number 2271, circa 1920.
- ItemJMF15-06848.0 - A Southern Pacific Railroad passenger train and freight train pass at Colfax, California, circa 1925