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 3001 - Steam locomotives
- 2057 more...
- ItemJMF00-01294.0 - Northern Pacific steam locomotive 2231 in 1921.
- ItemJMF00-01295.0 - Northern Pacific steam locomotive 2232 at Garrison, Montana, in 1953.
- ItemJMF00-01296.0 - Northern Pacific steam locomotive 2232 at Garrison, Montana, in 1953.
- ItemJMF00-01297.0 - Northern Pacific steam locomotive 2233 at Staples, Minnesota, in 1950.
- ItemJMF00-01298.0 - Northern Pacific steam locomotive 2233 at Jamestown, North Dakota, in 1934.
- ItemJMF00-01299.0 - Northern Pacific steam locomotive 2235 at Missoula, Montana, in 1943.
- ItemJMF00-01300.0 - Northern Pacific steam locomotive 2235 at Bozeman, Montana, in 1934.
- ItemJMF00-01301.0 - Northern Pacific steam locomotive 2236 at Brainerd, Minnesota, in 1950.
- ItemJMF00-01302.0 - Northern Pacific steam locomotive 2237 at Brainerd, Minnesota, in 1950.
- 579 more...