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
- 310 more...
- ItemJMF03-02144.0 - Northern Pacific diesel locomotive number 6007.
- ItemJMF03-02145.0 - Northern Pacific diesel locomotive number 6008 at Scoria, North Dakota, in 1950.
- ItemJMF03-02146.0 - Northern Pacific diesel locomotive number 6008 at Glendive, Montana, in 1950.
- ItemJMF03-02147.0 - Northern Pacific diesel locomotive number 6009 at Tacoma, Washington, in 1970.
- ItemJMF03-02148.0 - Northern Pacific diesel locomotive number 6010 at Tacoma, Washington, in 1970.
- ItemJMF03-02149.0 - Northern Pacific diesel locomotive number 6010 at Tacoma, Washington, in 1970.
- 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.
- 330 more...