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
- 393 more...
- ItemJMF03-02220.0 - Northern Pacific diesel locomotive number 6509 at Tacoma, Washington, in 1967.
- ItemJMF03-02221.0 - Northern Pacific diesel locomotive number 2506 at Auburn, Washington, in 1968.
- ItemJMF03-02222.0 - Northern Pacific diesel locomotive number 418 at Auburn, Washington, in 1968.
- ItemJMF03-02222.1 - Northern Pacific diesel locomotive number 418 at Auburn, Washington, in 1968.
- ItemJMF03-02223.0 - Northern Pacific diesel locomotive number 5403 at Auburn, Washington, in 1969.
- ItemJMF03-02224.0 - Northern Pacific diesel locomotive number 2529 at Auburn, Washington, in 1968.
- ItemJMF03-02225.0 - Northern Pacific diesel locomotive number 6703 at Seattle, Washington, in 1969.
- ItemJMF03-02225.1 - Northern Pacific diesel locomotive number 6703 at Seattle, Washington, in 1969.
- ItemJMF03-02226.0 - Northern Pacific diesel locomotive number 6703 at Tacoma, Washington, in 1967.
- 247 more...