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
- 618 more...
- 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.
- 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.
- 22 more...