- A Rolls-Royce RB211-235 series jet engine fuel control machined housing.
- "WORLD'S LARGEST GOVERNOR BUILDER".
- Woodward Aircraft control history circa 1993
- CFM56-5 series jet engine history from the WGC PMC June 1994 issue.
- "WORLD'S MOST EXPERIENCED GOVERNOR MANUFACTURER".
- Historical Aircraft information from the Woodward Prime Mover Control publication. Page 4.
- WGC PMC page 2.
- Histoical aircraft information. WGC PMC page 1.
- Brad's vintage machine shop manufacturing history project.
- WGC PMC page 3.