Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series010 - Other Railroads
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3008 - Railroads - Electrification
- ItemWWAPC0378 - Interurban railroad electrical substation at Renton, Washington, circa 1910.