Railroad Archives Online
- CollectionD0011 - James M. Fredrickson Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroad Buildings and Structures
- Subseries Level 3003 - Maintenance Facilities
- ItemJMF04-02539.0 - Northern Pacific roundhouse at Tacoma, Washington, in circa 1938.
- ItemJMF04-02540.0 - Northern Pacific roundhouse at Tacoma, Washington, circa 1938.
- ItemJMF04-02547.0 - Northern Pacific roundhouse at Tacoma, Washington, circa 1940.
- ItemJMF04-02632.0 - Northern Pacific roundhouse at Lester, Washington, circa 1900.
- ItemJMF04-02633.0 - Northern Pacific roundhouse at Lester, Washington, circa 1900.
- ItemJMF04-02634.0 - Northern Pacific roundhouse at Lester, Washington, circa 1914.
- ItemJMF04-02635.0 - Northern Pacific roundhouse at Lester, Washington, circa 1914.
- 9 more...