- Woodward Hydro Manual Number 07086B
- The Woodward Governor Company's Hydro market share before they sold out to the General Electric Company.
- Woodward Hydro Manual Number 07093
- Woodward Hydro Manual Number 07092B
- Woodward Hydro Manual Number 07087A
- Woodward Hydro Manual Number 07089
- 3
- Circa 1961. Hydro history is fun!
- 2
- Brad's hydroelectric power plant history project.
- 7
- 6
- Practical guide to model railroading history.
- Contents
- 10