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
- 2302 more...
- ItemJMF00-01514.0 - Northern Pacific steam locomotive 2660 at Laurel, Montana, in 1939.
- ItemJMF00-01515.0 - Northern Pacific steam locomotive 2660 at Staples, Minnesota, in 1950.
- ItemJMF00-01516.0 - Northern Pacific steam locomotive 2661 at Easton, Washington, in 1943.
- ItemJMF00-01517.0 - Northern Pacific steam locomotive 2661 at Easton, Washington, in 1943.
- ItemJMF00-01518.0 - Northern Pacific steam locomotive 2661 at Laurel, Montana, in 1953.
- ItemJMF00-01519.0 - Northern Pacific steam locomotive 2662 at Missoula, Montana, in 1943.
- ItemJMF00-01520.0 - Northern Pacific steam locomotive 2663 at Missoula, Montana, in 1943.
- ItemJMF00-01521.0 - Northern Pacific steam locomotive 2663 at Livingston, Montana, in 1955.
- ItemJMF00-01522.0 - Northern Pacific steam locomotive 2663 at Livingston, Montana, in 1955.
- 334 more...