- First printed manual in 1912 on the Woodward Oil-Pressure Governor.
- Woodward Governor Company's product catalog, circa 1964.
- 1
- 1912 application of Elmer Woodward's new hydraulic water wheel governor.
- WOODWARD'S NEW TYPE OF OIL PRESSURE WATER WHEEL GOVERNOR GATESHAFT TYPE CIRCA 1917-xx
- Woodward Governor Catalogue M showing the new factory on Mill Street.
- RELAY- VALVE OIL PRESSURE GOVERNOR CATALOG, CIRCA 1912.
- The Woodward Governor Company on Mill Street in Rockford(1910-1941).
- Bulletin 09026
- Bulletin 11004A.
- 3
- Bulletin 14043A.
- Manual 14045A.
- 4
- Bulletin 15003.