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
- 2437 more...
- ItemJMF00-01645.0 - Northern Pacific steam locomotive 4019 at Tacoma, Washington, in 1937.
- ItemJMF00-01646.0 - Northern Pacific steam locomotive 4021 at Garrison, Montana, in 1946.
- ItemJMF00-01647.0 - Northern Pacific steam locomotive 4021 at South Tacoma, Washington, in 1938.
- ItemJMF00-01648.0 - Northern Pacific steam locomotive 4021 at Missoula, Montana, in 1955.
- ItemJMF00-01649.0 - Northern Pacific steam locomotive 4021 at Missoula, Montana, in 1955.
- ItemJMF00-01650.0 - Northern Pacific steam locomotive 4021 at Missoula, Montana, in 1955.
- ItemJMF00-01651.0 - Northern Pacific steam locomotive 4023, in 1916.
- ItemJMF00-01652.0 - Northern Pacific steam locomotive 4023 at Easton, Washington, in 1943.
- ItemJMF00-01653.0 - Northern Pacific steam locomotive 4024 at Easton, Washington, in 1943.
- 199 more...