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
- 323 more...
- ItemJMF03-02157.0 - Northern Pacific diesel locomotive number 6016 at Helena, Montana, in 1952.
- ItemJMF03-02158.0 - Northern Pacific diesel locomotive number 6016 at Auburn, Washington, in 1967.
- ItemJMF03-02159.0 - Northern Pacific diesel locomotive number 6016 at Auburn, Washington, in 1968.
- ItemJMF03-02160.0 - Northern Pacific diesel locomotive number 6016 at Auburn, Washington, in 1968.
- ItemJMF03-02160.1 - Northern Pacific diesel locomotive number 6017 at Auburn, Washington, circa 1952.
- ItemJMF03-02160.2 - Northern Pacific diesel locomotive number 6017 at Auburn, Washington, circa 1952.
- ItemJMF03-02161.0 - Northern Pacific diesel locomotive number 6018 at Auburn, Washington, in 1952.
- ItemJMF03-02162.0 - Northern Pacific diesel locomotive number 6500 at East Auburn, Washington, in 1949.
- ItemJMF03-02163.0 - Northern Pacific diesel locomotive number 6501 at Butte, Montana, in 1949.
- 317 more...