Railroad Archives Online
- FondD0011 - James M. Fredrickson Collection
- Sorozat004 - Northern Pacific Railroad Company
- Alsorozat014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 001 - Steam locomotives
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- IratdarabJMF00-00151.2 - Northern Pacific steam locomotive 249 at Tacoma, Washington, in 1935.
- IratdarabJMF00-00151.3 - Northern Pacific steam locomotive 249 at Tacoma, Washington, in 1936.
- IratdarabJMF00-00151.4 - Northern Pacific steam locomotive 249 at Tacoma, Washington, in 1936.
- IratdarabJMF00-00151.5 - Northern Pacific steam locomotive 249 at Tacoma, Washington, in 1936.
- IratdarabJMF00-00152.0 - Northern Pacific steam locomotive 252, circa 1925.
- IratdarabJMF00-00153.0 - Northern Pacific steam locomotive 252 at Portland, Oregon, circa 1925.
- IratdarabJMF00-00153.1 - Northern Pacific steam locomotive 252 at Tacoma, Washington, in 1934.
- IratdarabJMF00-00153.2 - Northern Pacific steam locomotive 252 at Tacoma, Washington, in 1935.
- IratdarabJMF00-00154.0 - Northern Pacific steam locomotive 253 in 1916.
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