- Woodward CSSA propeller governor manual 33194.
- Woodward Water Wheel Governor Schematic Drawing.
- Elmer E. Woodward's state-of-the-art mechanical compensating type water wheel governor.
- Woodward Water Wheel Governor Schematic Drawing.
- List of water wheel governor parts.
- Woodward Water Wheel Governor Schematic Drawing.
- JAMES LEFFEL LETTERHEAD, CIRCA 1944.
- Elmer Woodward's operating manual for water wheel governors, circa 1911.
- Woodward Governor Company's shop order #1845, circa 1909.
- A Lombard Oil Pressure Water Wheel Governor blueprint circa 1938.
- Woodward PG 500 Governor Control System. Bulletin 14025.
- From the Woodward Governor Company's Engineering library.
- SPEED GOVERNOR PRINCIPLES.
- Another example of a blueprint of a mechanical water wheel governor Size D series 3, circa 1926.
- BLUEPRINT OF WYANDOTTE WORSTED COMPANY ROCHESTER, N.H.