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
- 125 more...
- 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.
- ItemJMF03-01969.0 - Northern Pacific diesel locomotive number 409 at Auburn, Washington, in 1970.
- ItemJMF03-01970.0 - Northern Pacific diesel locomotive number 410 at Auburn, Washington, in 1970.
- ItemJMF03-01971.0 - Northern Pacific diesel locomotive number 411 circa 1952.
- ItemJMF03-01972.0 - Northern Pacific diesel locomotive number 411 at Auburn, Washington, in 1970.
- ItemJMF03-01973.0 - Northern Pacific diesel locomotive number 412 at Auburn, Washington, in 1970.
- ItemJMF03-01974.0 - Northern Pacific diesel locomotive number 414 at Tacoma, Washington, in 1970.
- 515 more...