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
- 2423 more...
- ItemJMF00-01632.0 - Northern Pacific steam locomotive 4015 at Yakima, Washington, in 1937.
- ItemJMF00-01633.0 - Northern Pacific steam locomotive 4016 at Easton, Washington, in 1944.
- ItemJMF00-01634.0 - Northern Pacific steam locomotive 4016 at Easton, Washington, in 1943.
- ItemJMF00-01635.0 - Northern Pacific steam locomotive 4016 at Tacoma, Washington, in 1944.
- ItemJMF00-01636.0 - Northern Pacific steam locomotive 4017 in 1933.
- ItemJMF00-01637.0 - Northern Pacific steam locomotive 4017 at Garrison, Montana, in 1946.
- ItemJMF00-01638.0 - Northern Pacific steam locomotive 4017 at South Tacoma, Washington, in 1938.
- ItemJMF00-01639.0 - Northern Pacific steam locomotive 4017 at Yakima, Washington, in 1936.
- ItemJMF00-01640.0 - Northern Pacific steam locomotive 4017.
- 213 more...