- Elmer Woodward's fundamentals of speed governing.
- Page 2.
- Page 3.
- F4-xx
- F5-xx
- F6-xx
- F7-xx
- F8-xx
- Page 9.
- SPEED GOVERNOR PRINCIPLES.
- Page 2.
- Page 3.
- Woodward Water Wheel governor manufacuring from 1870 through the year 2001..
- Woodward Prime Mover Control history painting.
- Calvin C. Covert(November 1924 to December 1994).