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- The Hydraulic Equipment of the Colgate Power House History Project.
- A Rasdon Tangential Water Wheel advertisment from 1902.
- The Pelton Water Wheel Company History, circa 1902.
- A Risdon Iron Works advertisement from 1902.
- A Pelton Water Wheel Company advertisement from 1902.
- Fo the love of Hydro Engineering.
- The Journal of Electricity Power and Gas .
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