- Woodward... At the Heart of the System Since 1870.
- Woodward Service Pin History.
- Elmer Woodward's little propeller governor.
- Elmer Woodward and his little three pound governor history.
- From the Woodward 75 year anniversary history book, circa 1945.
- Elmer Woodward's first aircraft propeller governor type PW-34
- Woodward aircraft engine governor from 1934.
- Elmer Woodward's 1934 aircraft propeller governor.
- IT ALL BEGAN IN 1870 WITH ONE MAN.
- Newest find in 2018 for vintage Woodward Governor Company advertisement history, circa 1969.
- Woodward... At the Heart of the System Since 1870.
- From the archives...
- Woodward propeller governor type PW-31 from 1934
- Elmer Woodward's first aircraft engine propellor governor at the Smithsonian
- Woodward's small propeller governor type PW-34 on display