- The number one buyer of Woodward governors was the Electro-Motive Division, General Motors Company.
- Rockford history saved for the 21st. century.
- B. F. Barns Company advertisement from 1903.
- W. F. & John Barnes Company Rockford, Illinois.
- The General Electric Company and the Woodward Company have been partners in business since the 1940's.
- American Locomotive Company's Alco RS1 locomotive.
- American Locomotive Company's Alco PA locomotive.
- Fairbanks-Morse & Company came to Woodward in the 1930's for a diesel engine governor application solution.
- EMD F7 series locomotive with Woodward governors on 60% of their diesel units.
- WOODWARD MANUAL 14000C.
- World's most powerfull locomotive in the 1950's. All equipped with Woodward governors.
- THE ROCKFORD DRILLING MACHINE COMPANY.
- The W.F. & John Barnes Company, Rockford, Illinois.
- 1978 PMC ANNUAL ISSUES.
- 1921 ADVERTISEMENT ABOUT THE ALLIS-CHALMERS MFG COMPANY.