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
- 316 more...
- ItemJMF03-02150.0 - Northern Pacific diesel locomotive number 6011 at Dilworth, Minnesota, in 1954.
- ItemJMF03-02151.0 - Northern Pacific diesel locomotive number 6012 at Dilworth, Minnesota, in 1952.
- ItemJMF03-02152.0 - Northern Pacific diesel locomotive number 6013 at Auburn, Washington, in 1952.
- ItemJMF03-02153.0 - Northern Pacific diesel locomotive number 6015 at Auburn, Washington, in 1952.
- ItemJMF03-02154.0 - Northern Pacific diesel locomotive number 6016 at Spokane, Washington, in 1951.
- ItemJMF03-02155.0 - Northern Pacific diesel locomotive number 6016 at Spokane, Washington, in 1951.
- ItemJMF03-02156.0 - Northern Pacific diesel locomotive number 6016 at Livingston, Montana, in 1952.
- 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.
- 324 more...