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
- 2452 more...
- ItemJMF00-01660.0 - Northern Pacific steam locomotive 4025.
- ItemJMF00-01661.0 - Northern Pacific steam locomotive 4025 at Arlee, Montana, in 1958.
- ItemJMF00-01662.0 - Northern Pacific steam locomotive 4500 at Butte, Montana, in 1949.
- ItemJMF00-01663.0 - Northern Pacific steam locomotive 4500 at Butte, Montana, in 1949.
- ItemJMF00-01664.0 - Northern Pacific steam locomotive 4501 at Butte, Montana, in 1949.
- ItemJMF00-01665.0 - Northern Pacific steam locomotive 4501 at Butte, Montana, in 1949.
- ItemJMF00-01666.0 - Northern Pacific steam locomotive 4501 at Helena, Montana, in 1953.
- ItemJMF00-01667.0 - Northern Pacific steam locomotive 4502 at Livingston, Montana, in 1943.
- ItemJMF00-01669.0 - Northern Pacific steam locomotive 5000 at Mandan, North Dakota.
- 184 more...