Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth 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
- ItemWWAPC0367 - Chicago, Milwaukee, St. Paul and Pacific Railroad electric locomotive at Renton, Washington, circa 1920.
- ItemWWAPC0340 - Chicago, Milwaukee, St. Paul and Pacific Railroad freight train at Allentown, Washington in 1949.
- ItemWWAPC0426 - Chicago Milwaukee St. Paul and Pacific Railroad freight train at Maple Valley, Washington in 1944.
- ItemWWA-0056 - Milwaukee Road Class E-5 Number E39 boxcab electric set south of Seattle, Washington, undated.
- ItemWWA-0082 - Milwaukee Road Number E4 south of Seattle, Washington near Black River Junction, undated.
- ItemWWA-0093 - Milwaukee Road boxcab Number E-22 at Black River, Washington in 1963.
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