- Woodward Governor Company's patent number 3,251,373.
- Blueprint drawing history saved from the trash.
- PMC blueprint history.
- Oldwoodward.com blueprint history.
- PMC blueprint history.
- Governors at work.
- PMC blueprint history.
- Jet engine fuel control theory of operation history.
- Brad's whimsical picture of the oldest and newest components added to the oldwoodward collection.
- PMC blueprint history.
- PMC blueprint history.
- WOODWARD GATE SHAFT OIL PRESSURE GOVERNOR HISTORY.
- A Hydromechanical Gas Turbine Jet Engine Fuel Control.
- PMC blueprint history.
- PMC blueprint history.