- Woodward UG25 Actuator unit.
- From the oldwoodward.com blueprint collection.
- From the oldwoodward.com blueprint collection.
- Brad's Woodward UG8 governor history project.
- Brad's Woodward UG8 governor history project.
- A Woodward UG25 series governor for diesel engines.
- A Woodward UG25 series governor for diesel engines.