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
- 2379 more...
- ItemJMF00-01588.0 - Northern Pacific steam locomotive 4000 in 1916.
- ItemJMF00-01589.0 - Northern Pacific steam locomotive 4001 at Livingston, Montana, in 1943.
- ItemJMF00-01590.0 - Northern Pacific steam locomotive 4002 at Bozeman, Montana, in 1943.
- ItemJMF00-01591.0 - Northern Pacific steam locomotive 4003 at Bozeman, Montana, in 1943.
- ItemJMF00-01592.0 - Northern Pacific steam locomotive 4003 at Easton, Washington, circa 1915.
- ItemJMF00-01593.0 - Northern Pacific steam locomotive 4003 at Lester, Washington, circa 1915.
- ItemJMF00-01594.0 - Northern Pacific steam locomotive 4004 at Stampede, Washington, circa 1928.
- ItemJMF00-01596.0 - Northern Pacific steam locomotive 4004 at Easton, Washington, circa 1928.
- ItemJMF00-01597.1 - Northern Pacific steam locomotive 4004 at Helena, Montana, circa 1920.
- 257 more...