Railroad Archives Online
- ArkivD0011 - James M. Fredrickson Collection
- Serie004 - Northern Pacific Railroad Company
- Underserie014 - Photographs
- 003 - Railroad Buildings and Structures
- 003 - Maintenance Facilities
- ObjektJMF04-02539.0 - Northern Pacific roundhouse at Tacoma, Washington, in circa 1938.
- ObjektJMF04-02540.0 - Northern Pacific roundhouse at Tacoma, Washington, circa 1938.
- ObjektJMF04-02547.0 - Northern Pacific roundhouse at Tacoma, Washington, circa 1940.
- ObjektJMF04-02632.0 - Northern Pacific roundhouse at Lester, Washington, circa 1900.
- ObjektJMF04-02633.0 - Northern Pacific roundhouse at Lester, Washington, circa 1900.
- ObjektJMF04-02634.0 - Northern Pacific roundhouse at Lester, Washington, circa 1914.
- ObjektJMF04-02635.0 - Northern Pacific roundhouse at Lester, Washington, circa 1914.
- ObjektJMF04-02868.1 - Northern Pacific work train on Stampede Pass, Washington Territory, in 1887.
- 8 mer...