Railroad Archives Online
- CollectionD0011 - James M. Fredrickson Collection
- Series002 - Chicago, Milwaukee, St. Paul, and Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3009 - Electric Locomotives
- ItemJMF12-05940.0 - Chicago, Milwaukee, St. Paul & Pacific Railroad Company electric locomotive number E-1 at Tacoma, Washington, circa 1938.
- ItemJMF12-05941.0 - Chicago, Milwaukee, St. Paul & Pacific Railroad Company electric locomotive number E-2 at Tacoma, Washington, on June 22, 1946.
- ItemJMF12-05942.0 - Chicago, Milwaukee, St. Paul & Pacific Railroad Company electric locomotive number E-2 at Tacoma, Washington in 1943.
- ItemJMF12-05943.0 - Chicago, Milwaukee, St. Paul & Pacific Railroad Company electric locomotive number E-4 at Tacoma, Washington in 1949.
- ItemJMF12-05944.0 - Chicago, Milwaukee, St. Paul & Pacific Railroad Company electric locomotive number E-4 at Renton, Washington in 1949.
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