- Amos Woodward's small machine shop in Rockford, Illinois.
- NIAGARA FALLS BOOK PAGE 203
- Amos Woodward pump patent 222,116, circa 1879.
- AMERICAN INVENTOR.
- First Woodward Water Wheel Governor.
- AMERICAN INVENTOR.
- The patent model of the first A.W. Woodward governor.
- Member manual from the archives.
- NIAGARA FALLS BOOK PAGE 202.
- AMERICAN INVENTOR.
- Elmer Woodward's first aircraft propeller governor type PW-34
- WOODWARD COMMERCIAL GAS TURBINE ENGINE TYPE 1307 FUEL CONTROL.
- Elmer Woodward's 1934 aircraft propeller governor.
- Woodward aircraft engine governor from 1934.
- Patent model picture 4.