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
- 198 more...
- ItemJMF03-02036.0 - Northern Pacific diesel locomotive number 2521 at Auburn, Washington, in 1968.
- ItemJMF03-02037.0 - Northern Pacific diesel locomotive number 2522 at Auburn, Washington, in 1968.
- ItemJMF03-02038.0 - Northern Pacific diesel locomotive number 2522 at Auburn, Washington, in 1968.
- ItemJMF03-02039.0 - Northern Pacific diesel locomotive number 2523 at Auburn, Washington, in 1967.
- ItemJMF03-02040.0 - Northern Pacific diesel locomotive number 2523 at Auburn, Washington, in 1968.
- ItemJMF03-02041.0 - Northern Pacific diesel locomotive number 2523 at Auburn, Washington, in 1968.
- ItemJMF03-02042.0 - Northern Pacific diesel locomotive number 2524 at Auburn, Washington, in 1967.
- ItemJMF03-02043.0 - Northern Pacific diesel locomotive number 2527 at Auburn, Washington, in 1969.
- ItemJMF03-02044.0 - Northern Pacific diesel locomotive number 2528 at Auburn, Washington, in 1967.
- 442 more...