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
- 119 more...
- ItemJMF03-01960.0 - Northern Pacific diesel locomotive number 400 at Spokane, Washington, in 1950.
- ItemJMF03-01961.0 - Northern Pacific diesel locomotive number 401 at Tacoma, Washington, in 1967.
- ItemJMF03-01962.0 - Northern Pacific diesel locomotive number 402 at Spokane, Washington, in 1951.
- ItemJMF03-01963.0 - Northern Pacific diesel locomotive number 403 at Auburn, Washington, in 1970.
- ItemJMF03-01964.0 - Northern Pacific diesel locomotive number 404 at Spokane, Washington, in 1950.
- ItemJMF03-01965.0 - Northern Pacific diesel locomotive number 405 at Auburn, Washington, in 1949.
- ItemJMF03-01966.0 - Northern Pacific diesel locomotive number 406 at Tacoma, Washington, in 1944.
- ItemJMF03-01967.0 - Northern Pacific diesel locomotive number 407 at Auburn, Washington, in 1968.
- ItemJMF03-01968.0 - Northern Pacific diesel locomotive number 408 at Auburn, Washington, in 1970.
- 521 more...