- From the Oldwoodward.com archives.
- Steam Engine History.
- The Woodward Governor Company History, circa 1919.
- The James Leffel Water Wheel Company history.
- The James Leffel Water Wheel Company history.
- Page 278. Turbine Water Wheel History.
- Page 13.
- MILLING HISTORY.
- ROLLER MILLS FOR GRINDING MALT FOR THE STEVENS POINT BREWERY.
- MONARCH ROLLER MILL HISTORY.
- Industrial manufacturing history is fun!
- Trademark of quality.
- MONARCH FLOWER MILLING MACHINERY HISTORY.
- Mill governors.
- Woodward Governor Company data sheet page 3.