- Elmer E. Woodward's new water wheel governor from three patents.
- Elmer E. Woodward's state-of-the-art mechanical compensating type water wheel governor.
- Woodward history painting.
- Woodward history.
- Patent page 4.
- History in the making!
- Patent page 2.
- Patent page 3.
- Speer Products Company letter. Page 3.
- Patent page 5.
- WOODWARD OIL PRESSURE WATER WHEEL GOVERNOR TABULATION CHART, CIRCA 1947.
- Mechanical size D governor serial number 6039, circa 1958. Page 1.
- Woodward history key to different fuel controls.
- Woodward history painting.
- Woodward history.