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
- 288 more...
- 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.
- ItemJMF03-02127.0 - Northern Pacific diesel locomotive number 6004 at Easton, Washington, circa 1945.
- ItemJMF03-02128.0 - Northern Pacific diesel locomotive number 6005 at Auburn, Washington, in 1949.
- ItemJMF03-02129.0 - Northern Pacific diesel locomotive number 6005 at Auburn, Washington, in 1949.
- ItemJMF03-02129.1 - Northern Pacific diesel locomotive number 6005 at Martin, Washington, in 1945.
- ItemJMF03-02130.0 - Northern Pacific diesel locomotive number 6006 at Easton, Washington, in 1945.
- ItemJMF03-02131.0 - Northern Pacific diesel locomotive number 6007 at Easton, Washington, in 1945.
- 352 more...