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 3002 - Diesel locomotives
- ItemJMF02-03783.0 - Southern Pacific diesel locomotive SP 6387 at Tacoma-Reservation, Washington, in 1967.
- ItemJMF02-03783.1 - Southern Pacific diesel locomotive SP 6387 at Tacoma-Reservation, Washington, in 1967.
- ItemJMF02-03799.0 - Southern Pacific diesel locomotive 6387 at Tacoma, Washington, in 1967.
- ItemJMF15-06730.0 - Southern Pacific Railroad diesel locomotive number 2608 at Portland, Oregon in 1990.
- ItemJMF15-06732.0 - Southern Pacific Railroad diesel locomotive number 4000 at Redwood City, California in 1973.
- ItemJMF15-06733.0 - Southern Pacific Railroad diesel locomotive number 4368 in 1987.
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