- Documenting the evolution of the Woodward governor control system.
- The Woodward Governor Company's Catalogue M. Page 4.
- The Woodward Governor Company's Catalogue M. Page 3.
- The Woodward Governor Company at 240-250 Mill Street in Rockford, Illinois.
- Page 5. The Volta Hydro-electric power station at Great Falls.
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- To bring together the records of the past...
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- The Woodward Governor Company's Catalogue M cover sheet.
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