Railroad Archives Online
- FondoD0011 - James M. Fredrickson Collection
- Serie010 - Other Railroads
- Subserie014 - Photographs
- 004 - Railroad tracks
- 001 - Railroad mainline
- Unidad documental simpleJMF19-14251.0 - Denver & Rio Grande Western Railroad switch at Castle Crag, Utah, circa 1890.
- Unidad documental simpleJMF24-15104.0 - Puget Sound Electric (PSE) track flooded in the White River Valley at Auburn, Washington, circa 1917
- Unidad documental simpleJMF11-09880.0 - Curtis Millburn & Eastern Track Construction in September 1975.
- Unidad documental simpleJMF11-09880.1 - Curtis Millburn & Eastern Track Construction in September 1975.