- Letter to Woodward Governor Company for a size 3 Water Wheel Governor, circa 1913.
- DATA FOR ORDERING TURBINE GOVERNOR PAGE 2. WE LOVE HISTORY!!!
- DATA FOR ORDERING TURBINE GOVERNOR FROM THE ARCHIVES.
- The James Leffel Company purchase order to the Woodward Governor Company.
- The Woodward Governor Company had a long relationship with the James Leffel Company making hundreds of governors for thieir turbine water wheels.
- JAMES LEFFEL & COMPANY ADVERTISEMENT.