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
- 282 more...
- ItemJMF03-02119.0 - Northern Pacific diesel locomotive number 6001 at Easton, Washington, in 1944.
- ItemJMF03-02120.0 - Northern Pacific diesel locomotive number 6001 at Easton, Washington, in 1944.
- ItemJMF03-02121.0 - Northern Pacific diesel locomotive number 6002 at Auburn, Washington, in 1949.
- ItemJMF03-02122.0 - Northern Pacific diesel locomotive number 6003 at Kanaskat, Washington, in 1944.
- ItemJMF03-02123.0 - Northern Pacific diesel locomotive number 6003 at Easton, Washington, in 1945.
- ItemJMF03-02123.1 - Northern Pacific diesel locomotive number 6004 at Easton, Washington, in 1945.
- ItemJMF03-02124.0 - Northern Pacific diesel locomotive number 6004 at Lester, Washington, in 1945.
- ItemJMF03-02125.0 - Northern Pacific diesel locomotive number 6004 at Easton, Washington, circa 1945.
- ItemJMF03-02126.0 - Northern Pacific diesel locomotive number 6004 at Easton, Washington, circa 1945.
- 358 more...