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 3001 - Steam Locomotives
- ItemWWAPC0348 - Chicago, Milwaukee, St. Paul and Pacific Railroad steam locomotive number 684 at Black River Junction, Washington in 1944.
- ItemWWAPC0368 - Chicago, Milwaukee, St. Paul and Pacific Railroad steam locomotive number 726 at Renton, Washington in 1947.
- ItemWWAPC0402 - Chicago Milwaukee St. Paul and Pacific Railroad steam locomotive number 51 at Renton, Washington, circa 1947.
- ItemWWAPC0437 - Chicago Milwaukee St. Paul and Pacific Railroad locomotives at Maple Valley, Washington, circa 1950.
- ItemWWAMP0065 - Milwaukee Road Number steam locomotive Number 53 at Tacoma, Washington in 1948.
- ItemWWAMP0713 - Milwaukee Road steam locomotive Number 5611 at Argo in Seattle, Washington circa 1925.
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