- A James Leffel Water Wheel blueprint number 43640, circa 1944.
- Closeup showing the application of the Woodward vertical model compensating governor.
- Elmer Woodward's favorite magazine to read.
- A 1944 James Leffel Water Wheel blueprint drawing showing a Woodward size D governor.
- Is this Mill still standing? What happened to the Woodward governor?
- THE BIG PLOVER MILLS HYDRO-ELECTRIC POWER HOUSE DATA.
- THE BIG PLOVER MILLS HYDRO-ELECTRIC POWER HOUSE DATA.
- HISTORICAL FACTS ABOUT THE JORDAN HYDRO-ELECTRIC POWER PLANT PAGE 3.
- HISTORICAL FACTS ABOUT THE JORDAN HYDRO-ELECTRIC POWER PLANT.
- HISTORICAL FACTS ABOUT THE JORDAN HYDRO-ELECTRIC POWER PLANT PAGE 2.
- History about the Jordan hydropower property. Page 2.
- History about the Jordan hydro-electric powerplant property.