- Elmer Woodward looking over a governor system in 1939.
- From the 1955 Woodward Prime Mover Control issue.
- From the 1959 Woodward annual report.
- Gas engine governing. 2.
- Gas Engine Governing. PMC May 1954.
- Gas Engine Governing. PMC May 1954.
- In the office area.
- Irl C. Martin, CEO of the Company.
- July 1952 Plant News Supplement to the Prime Mover Control pamphlet.
- Looking back at the Woodward Governor Company's Jet engine fuel control history.
- Looking back at Woodward Governor Company's control history.
- Looking back at Woodward Governor Company's history.
- On display at the Smithsonian Institution Museum.
- On display at the Smithsonian Institution Museum.
- Page 6. Gas engine governing.