Railroad Archives Online
- FondsD0011 - James M. Fredrickson Collection
- Série004 - Northern Pacific Railroad Company
- Sous-série014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 002 - Diesel locomotives
- 550 en plus...
- PièceJMF02-03726.0 - Northern Pacific steam locomotive 4016 at Stampede, Washington, in 1945.
- PièceJMF02-03727.0 - Northern Pacific diesel locomotive 6000 at Stampede, Washington, in 1949.
- PièceJMF02-03727.1 - Northern Pacific diesel locomotive 6000 at Stampede, Washington, in 1949.
- PièceJMF02-03728.0 - Northern Pacific diesel locomotive at Borup Loop, Washington, in 1962.
- PièceJMF02-03728.1 - Northern Pacific freight train at Borup Loop, Washington, in 1962.
- PièceJMF02-03729.0 - Northern Pacific diesel locomotive at Stampede, Washington, in 1962.
- PièceJMF02-03730.0 - Northern Pacific diesel locomotive 6007 at Stampede, Washington, in 1945.
- PièceJMF02-03731.0 - Northern Pacific diesel locomotive 6007 at Stampede, Washington, in 1945.
- PièceJMF02-03732.0 - Northern Pacific diesel locomotive at Stampede, Washington, circa 1950.
- 90 en plus...