- WGC PMC JANUARY 1989.
- Wisconsin Hydro history. Page 2.
- Wisconsin Hydro history. Page 3.
- Wisconsin Hydro history. Page 4.
- Wisconsin Hydro history. Page 5.
- Wisconsin Hydro history. Page 6.
- PMC 7.
- WGC PMC CTL JANUARY 1989.
- The Woodward Governor Company replaced and upgraded many vintage governors over the decades.
- 15 converted and upgraded Woodward gateshaft type governors installed in 1930.