- Woodward Governor Company advertisement history.
- Woodward Governor Company advertisement history.
- Woodward Governor Company advertisement history.
- Woodward Governor Company advertisement history.
- Woodward Governor Company advertisement history.
- Woodward Governor Company advertisement history.
- W. F. & John Barnes Company
- The Fairbanks-Morse Company's Woodward IC governor application.
- The Curtiss Proportional Electric Governor Control System Manual
- Marquette Hydraulic Governor Operation Manual.
- Marquette Hydraulic Governor History.
- Ingersoll Milling Machine Company.
- Ingersoll Milling Machine Company, Rockford, Ill.
- How does a Woodward diesel engine governor work?
- GISHOLT MACHINE COMPANY.