Railroad Archives Online
- FondD0011 - James M. Fredrickson Collection
- Sorozat004 - Northern Pacific Railroad Company
- Alsorozat014 - Photographs
- 004 - Railroad Tracks
- 001 - Railroad mainline
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- IratdarabJMF04-02856.0 - Description of Northern Pacific switchback at Stampede Pass, Washington Territory, in 1887.
- IratdarabJMF04-02860.0 - Northern Pacific switchback at Stampede Pass, Washington Territory, circa 1887.
- IratdarabJMF04-02868.0 - Northern Pacific mainline at Stampede Pass, Washington Territory, in 1887.
- IratdarabJMF04-02869.0 - Northern Pacific mainline at Stampede Pass, Washington Territory, in 1887.
- IratdarabJMF04-02899.0 - Wilkeson, Washington, circa 1910.
- IratdarabJMF04-02899.2 - Wilkeson, Washington, circa 1910.
- IratdarabJMF04-02900.0 - Former Northern Pacific track at Carbonado/Wllkeson, Washington, in 1974.
- IratdarabJMF04-02901.0 - Former Northern Pacific track at Carbonado/Wllkeson, Washington, in 1974.
- IratdarabJMF04-02902.0 - Former Northern Pacific track at Carbonado/Wllkeson, Washington, in 1974.
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