- History not to be in the year 2020.
- Small gas turbine history.
- INGERSOLL MILLING MACHING COMPANY, CIRCA 1922.
- Nimrod APU
- Barn's Upright Drills
- Woodward Governor Company's Hydraulic Turbine Water Wheel Governor advertisement.
- Constant Speed Drive for Boeing 727, Sundstrand Corporation - Museum of Science and Industry (Chicago) - DSC06323
- From the oldwoodward.com archives.
- Woodward... At the Heart of the System Since 1870.
- MADE IN ROCKFORD
- Rover AAPP MK10401 twin shaft engine (HS748 APU).
- SUNDSTRAND MACHINE TOOL COMPANY HISTORY.
- MADE IN ROCKFORD.
- Rockford machine shop manufacturing history project.
- SUNDSTRAND MACHINE TOOL COMPANY HISTORY.