- PMC July 1991.
- A Woodward Prime Mover Control history project.
- PMC October 1989.
- PMC May 1994.
- PMC February 1994.
- PMC April 1995.
- PMC June 1995.
- PMC September 1995.
- PMC January 1986.
- A Woodward Governor Company History Book, circa 1960's.
- Woodward... The World's oldest and largest manufacturer of Prime Mover Controls.
- Inside cover page 1.
- Inside cover page 2.
- OldWoodward.com... The World Wide Web's largest Woodward governor historical facts and figures website.
- PMC July 1995.