- Governor for the World Radio Missionary in Ecuador. Price quote.
- Governor for the World Radio Missionary in Ecuador, circa 1980.
- The Pelton Water Wheel Company history, circa 1919.
- A run of the river small hydro-electric power plant from 1915.
- THE LOMBARD GOVERNOR COMPANY, CIRCA 1919.
- General Electric Company ad from 1919.
- Page 14. WOODWARD MECHANICAL GOVERNOR APPLICATION,
- Page 9. WOODWARD GOVERNOR APPLICATION!!!