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- The last generation schematic drawing of the Woodward Governor Company's Turbine Water Wheel Governor system(gate shaft type).
- The last generation(1995) schematic drawing of the Woodward Governor Company's Turbine Water Wheel Governor system.
- The last generation(1995) schematic drawing of the Woodward Governor Company's Turbine Water Wheel Governor system.
- Irl C. Martin's Notes On The Old Woodward Governor Company's Water Wheel Governor Numbering System.
- Irl C. Martin's Notes On The Old Woodward Governor Company's Water Wheel Governor Numbering System.
- Circa 1925.
- Looking back at some Woodward Governor Company water power control history over the years.
- Looking back at some Woodward Governor Company water power control history over the years.