Railroad Archives Online
- FondsD0011 - James M. Fredrickson Collection
- Série010 - Other Railroads
- Sous-série014 - Photographs
- 004 - Railroad tracks
- 001 - Railroad mainline
- PièceJMF19-14251.0 - Denver & Rio Grande Western Railroad switch at Castle Crag, Utah, circa 1890.
- PièceJMF24-15104.0 - Puget Sound Electric (PSE) track flooded in the White River Valley at Auburn, Washington, circa 1917
- PièceJMF11-09880.0 - Curtis Millburn & Eastern Track Construction in September 1975.
- PièceJMF11-09880.1 - Curtis Millburn & Eastern Track Construction in September 1975.