- Woodward catalogue page from 1918.
- The new Woodward Hydraulic Governor, circa 1914.
- Elmer E Woodward's new hydrauic governor for turbine water wheels.
- RELAY-VALVE OIL PRESSURE GOVERNOR MANUAL FROM 1912.
- Woodward VR series turbine water wheel governor.
- Woodward VR series Oil Pressure water wheel governor.
- STATE OF THE ART ENERGY CONTROLS SINCE 1870.
- 1995, 4 for 1 stock split.
- Elmer E. Woodward's state-of-the-art oil pressure relay valve water wheel governors patented in 1912.
- The Woodward Governor Factory on Mill Street in the Water Power District in Rockford, Illinois(1910-1941).
- Elmer E. Woodward's state-of-the-art oil pressure relay valve water wheel governor patented in 1912.
- Data from Water Power Engineering, circa 1908.
- Another vintage Elmer Woodward ad from 1905.
- Elmer E. Woodward's state-of-the-art mechanical compensating type water wheel governor.
- Elmer E. Woodward's new water wheel governor from three patents.