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 3002 - Diesel locomotives
- 623 more...
- ItemJMF02-03870.0 - Northern Pacific diesel locomotive 3613 at Sprague, Washington, in 1968.
- ItemJMF02-03872.0 - Northern Pacific diesel locomotive 2502 at Sandpoint, Idaho, in 1965.
- ItemJMF02-03872.1 - Northern Pacific diesel locomotive 2502 at Sandpoint, Idaho, in 1965.
- ItemJMF02-03885.0 - Northern Pacific diesel locomotive 5409 at St. Regis, Montana, in 1953.
- ItemJMF02-03889.0 - Northern Pacific diesel locomotive 2524 at Missoula, Montana, in 1968.
- ItemJMF02-03889.1 - Northern Pacific diesel locomotive 2524 at Missoula, Montana, in 1968.
- ItemJMF02-03893.0 - Northern Pacific diesel locomotive 859 at Bozeman, Montana, in 1955.
- ItemJMF02-03894.0 - Northern Pacific diesel locomotive 7007A at Bozeman, Montana, in 1955.
- ItemJMF02-03899.3 - Northern Pacific diesel locomotive 7000 at Muir, Montana, in 1954.
- 17 more...