Railroad Archives Online
- FondsD0011 - James M. Fredrickson Collection
- Série004 - Northern Pacific Railroad Company
- Sous-série014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 003 - Freight cars
- PièceJMF01-03701.0 - French box car at Olympia, Washington, circa 1954.
- PièceJMF01-3600.1 - Northern Pacific trains meet near Chehalis, Washington, in 1954.
- PièceJMF02-03708.0 - Northern Pacific freight train near East Auburn, Washington, in 1967.
- PièceJMF02-03709.0 - Northern Pacific freight train near East Auburn, Washington, in 1967.
- PièceJMF02-03707.0 - Northern Pacific freight train near East Auburn, Washington, in 1967.
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