- Woodward Governor Company's compensating type water wheel governor data.
- DRAWING OF TYPE B WOODWARD GOVERNOR, CIRCA 1902.
- Elmer E. Woodward's state-of-the-art oil pressure relay valve water wheel governor patented in 1912.
- Woodward factory photo of their new oil-pressure governor for turbine water wheels, circa 1914.
- AMERICAN ELECTRICIAN PAGE 2.
- American Manufacturer page 2.
- AMERICAN ELECTRICIAN PAGE 1, CIRCA 1903.
- WOODWARD FRICTION WATER WHEEL GOVERNOR, CIRCA 1903.
- Brad's Woodward governor history project. American Manufacturer page 1.
- ALLIS-CHALMERS TURBINE WATER WHEEL.
- WOODWARD GATE SHAFT OIL PRESSURE GOVERNOR HISTORY.
- 1979.
- 1968
- SERIES HR2500, CIRCA 1968.
- 1923.