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
- 587 more...
- ItemJMF02-03786.0 - Northern Pacific diesel locomotive 6020 at Auburn, Washington, in 1953.
- ItemJMF02-03787.0 - Northern Pacific diesel locomotive 6018A at Tacoma-Reservation, Washington, in 1969.
- ItemJMF02-03791.0 - Northern Pacific diesel locomotive at Tacoma, Washington, in 1970.
- ItemJMF02-03794.0 - Northern Pacific diesel locomotive 403 at Tacoma-Ruston, Washington, in 1970.
- ItemJMF02-03809.0 - Northern Pacific diesel locomotive 231 at Titlow, Washington, in 1969.
- ItemJMF02-03812.0 - Northern Pacific diesel locomotive 137 at Tacoma, Washington.
- ItemJMF02-03813.0 - Northern Pacific diesel locomotive 6502C at Tacoma-McCarver St, Washington, in 1968.
- ItemJMF02-03814.0 - Northern Pacific diesel locomotive 6019A at Tacoma-McCarver St, Washington, in 1969.
- ItemJMF02-03815.0 - Northern Pacific diesel locomotive 6019A at Tacoma, Washington, in 1969.
- 53 more...