- A vintage Rockford machine shop manufacturing history project.
- WOODWARD HYDRAULIC GOVERNORS.
- WOODWARD HYDRAULIC GOVERNORS.
- DIESEL ENGINE CATALOG FOR 1958.
- The Curtiss-Wright Massey Hydraulic Isochronous governors.
- MARQUETTE HYDRAULIC GOVERNOR SYSTEMS. 2.
- MARQUETTE HYDRAULIC GOVERNOR SYSTEMS.
- WOODWARD HYDRAULIC GOVERNORS. 2.
- WOODWARD HYDRAULIC GOVERNORS.
- FARRIS PICKERING GOVERNOR SYSTEMS.
- FARRIS PICKERING GOVERNOR SYSTEMS.
- The Westinghouse Electric Governor System.
- The Westinghouse Electric Governor System.
- PIERCE GOVERNOR COMPANY.
- PIERCE GOVERNOR COMPANY.