Railroad Archives Online
- FondoD0011 - James M. Fredrickson Collection
- Serie006 - Southern Pacific Railroad Company
- Sottoserie014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 001 - Steam Locomotives
- Unità documentariaJMF15-06700.0 - Southern Pacific Railroad steam locomotive number 1901 at Portland, Oregon, circa 1910.
- Unità documentariaJMF15-06701.0 - Southern Pacific Railroad steam locomotive number 3025 at Los Angeles, California in 1973.
- Unità documentariaJMF15-06702.0 - Southern Pacific Railroad steam locomotive number 3611 at Davis, California in 1947.
- Unità documentariaJMF15-06703.0 - Southern Pacific Railroad steam locomotive number 3677 at Sparks, Nevada in 1941.
- Unità documentariaJMF15-06704.0 - Southern Pacific Railroad steam locomotive number 3909 at Canby, Oregon in 1947.
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