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
- 576 more...
- ItemJMF02-03767.3 - Northern Pacific diesel locomotive 239 at Black River, Washington, in 1970.
- ItemJMF02-03768.0 - Northern Pacific diesel locomotive 239 at Renton, Washington, in 1970.
- ItemJMF02-03769.0 - Northern Pacific diesel locomotive 557 at Kirkland, Washington, in 1952.
- ItemJMF02-03770.0 - Northern Pacific diesel locomotive 557 at Quendall, Washington, in 1952.
- ItemJMF02-03773.0 - Northern Pacific diesel locomotive 5407 at Snohomish, Washington, in 1955.
- ItemJMF02-03773.1 - Northern Pacific diesel locomotive 5407 at Arlington, Washington, in 1955.
- ItemJMF02-03778.0 - Northern Pacific diesel locomotive 555 at Black River, Washington, in 1967.
- ItemJMF02-03779.0 - Northern Pacific diesel locomotive 557 at Wilburton, Washington, in 1952.
- ItemJMF02-03782.0 - Northern Pacific diesel locomotive 5409 at Arlington, Washington, in 1955.
- 64 more...