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
- 351 more...
- ItemJMF03-02183.0 - Northern Pacific diesel locomotive number 6508 at Pasco, Washington, in 1949.
- ItemJMF03-02184.0 - Northern Pacific diesel locomotive number 6508 at Tacoma, Washington, in 1967.
- ItemJMF03-02185.0 - Northern Pacific diesel locomotive number 6509 at Tacoma, Washington, in 1967.
- ItemJMF03-02186.0 - Northern Pacific diesel locomotive number 6509 circa 1950.
- ItemJMF03-02187.0 - Northern Pacific diesel locomotive number 6511 at Tacoma, Washington, in 1950.
- ItemJMF03-02188.0 - Northern Pacific diesel locomotive number 6511 at East Auburn, Washington, in 1950.
- ItemJMF03-02189.0 - Northern Pacific diesel locomotive number 6512 at Tacoma, Washington, in 1950.
- ItemJMF03-02190.0 - Northern Pacific diesel locomotive number 6512 at Easton, Washington, in 1950.
- ItemJMF03-02191.0 - Northern Pacific diesel locomotive number 6513 at Seattle, Washington, circa 1950.
- 289 more...