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
- 2197 more...
- ItemJMF00-01419.0 - Northern Pacific steam locomotive 2501 at Glendive, Montana, in 1953.
- ItemJMF00-01420.0 - Northern Pacific steam locomotive 2502 at Glendive, Montana, in 1950.
- ItemJMF00-01421.0 - Northern Pacific steam locomotive 2502 at Glendive, Montana, in 1950.
- ItemJMF00-01422.0 - Northern Pacific steam locomotive 2502 at Glendive, Montana, in 1953.
- ItemJMF00-01423.0 - Northern Pacific steam locomotive 2502 at Glendive, Montana, in 1953.
- ItemJMF00-01424.0 - Northern Pacific steam locomotive 2503 at Glendive, Montana, in 1953.
- ItemJMF00-01425.0 - Northern Pacific steam locomotive 2503 at Glendive, Montana, in 1953.
- ItemJMF00-01426.0 - Northern Pacific steam locomotive 2504, in 1916.
- ItemJMF00-01427.0 - Northern Pacific steam locomotive 2505 at Mandan, North Dakota, in 1950.
- 439 more...