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
- 479 more...
- ItemJMF00-00075.0 - Northern Pacific steam locomotive 26 at Billings, Montana, in 1953.
- ItemJMF00-00076.0 - Northern Pacific steam locomotive 27 at Billings, Montana, in 1949.
- ItemJMF00-00076.1 - Northern Pacific steam locomotive 27 at Billings, Montana, in 1938.
- ItemJMF00-00077.0 - Northern Pacific steam locomotive 27 at Billings, Montana, in 1949.
- ItemJMF00-00078.0 - Northern Pacific steam locomotive 28 at Butte, Montana, in 1949.
- ItemJMF00-00079.0 - Northern Pacific steam locomotive 29 at Butte, Montana, in 1949.
- ItemJMF00-00080.0 - Northern Pacific steam locomotive 29 at Butte, Montana, in 1949.
- ItemJMF00-00081.0 - Northern Pacific steam locomotive 30 at Tacoma, Washington, in 1946.
- ItemJMF00-00082.0 - Northern Pacific steam locomotive 31 at Helena, Montana, in 1955.
- 2157 more...