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
- 614 more...
- ItemJMF02-03838.0 - Northern Pacific diesel locomotive 6052A at Tacoma, Washington, in 1969.
- ItemJMF02-03840.0 - Northern Pacific diesel locomotive 250 at Tacoma, Washington, in 1970.
- ItemJMF02-03840.1 - Northern Pacific diesel locomotive 250 at Tacoma, Washington, in 1970.
- ItemJMF02-03840.2 - Northern Pacific diesel locomotive 250 at Tacoma, Washington, in 1970.
- ItemJMF02-03842.0 - Northern Pacific diesel locomotive at Tacoma, Washington, in 1969.
- ItemJMF02-03853.0 - Northern Pacific diesel locomotive 161 at Markham, Washington, in 1969.
- ItemJMF02-03854.0 - Northern Pacific diesel locomotive 161 at Markham, Washington, in 1969.
- ItemJMF02-03855.0 - Northern Pacific diesel locomotive 161 at Markham, Washington, in 1969.
- ItemJMF02-03868.0 - Northern Pacific diesel locomotive 2512 at Spokane, Washington, in 1965.
- 26 more...