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
- 83 more...
- ItemJMF03-01926.0 - Northern Pacific diesel locomotive number 249 at Tacoma, Washington, in 1970.
- ItemJMF03-01927.0 - Northern Pacific diesel locomotive number 250 at Tacoma, Washington, in 1970.
- ItemJMF03-01928.0 - Northern Pacific diesel locomotive number 250 at Tacoma, Washington.
- ItemJMF03-01929.0 - Northern Pacific diesel locomotive number 251 at Auburn, Washington, in 1970.
- ItemJMF03-01930.0 - Northern Pacific diesel locomotive number 252 at Tacoma, Washington, in 1967.
- ItemJMF03-01930.1 - Northern Pacific diesel locomotive number 254 at Auburn, Washington, in 1968.
- ItemJMF03-01931.0 - Northern Pacific diesel locomotive number 255 at Tacoma, Washington, in 1970.
- ItemJMF03-01932.0 - Northern Pacific diesel locomotive number 256 at Tacoma, Washington, in 1970.
- ItemJMF03-01933.0 - Northern Pacific diesel locomotive number 258 at Seattle, Washington.
- 557 more...