Railroad Archives Online
- CollectionD0011 - James M. Fredrickson Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3002 - Diesel locomotives
- 137 more...
- ItemJMF03-01978.0 - Northern Pacific diesel locomotive number 417 at Auburn, Washington, in 1970.
- ItemJMF03-01979.0 - Northern Pacific diesel locomotive number 419 at Auburn, Washington, in 1950.
- ItemJMF03-01980.0 - Northern Pacific diesel locomotive number 420 at Auburn, Washington, in 1970.
- ItemJMF03-01981.0 - Northern Pacific diesel locomotive number 420 at Spokane, Washington, in 1950.
- ItemJMF03-01982.0 - Northern Pacific diesel locomotive number 421 at Auburn, Washington, in 1968.
- ItemJMF03-01983.0 - Northern Pacific diesel locomotive number 423 at Auburn, Washington, in 1968.
- ItemJMF03-01984.0 - Northern Pacific diesel locomotive number 423 at Auburn, Washington, in 1970.
- ItemJMF03-01985.0 - Northern Pacific diesel locomotive number 424 at Auburn, Washington, in 1970.
- ItemJMF03-01986.0 - Northern Pacific diesel locomotive number 425 at Tacoma, Washington.
- 503 more...