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
- 628 more...
- 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.
- ItemJMF02-03899.4 - Northern Pacific diesel locomotive 7000 at Muir, Montana, in 1954.
- ItemJMF02-03899.5 - Northern Pacific diesel locomotive 7000 at Muir, Montana, in 1954.
- ItemJMF02-03900.0 - Northern Pacific diesel locomotive 857 at Muir, Montana, in 1955.
- ItemJMF02-03900.1 - Northern Pacific diesel locomotive 857 at Muir, Montana, in 1955.
- ItemJMF02-03916.0 - Northern Pacific diesel locomotive 6007 at Mandan, North Dakota, in 1950.
- 12 more...