- A vintage Rockford machine shop manufacturing history project.
- A vintage Rockford machine shop manufacturing history project.
- Emerson-Brantingham Company.
- COTTA TRANSMISION COMPANY.
- EMERSON-BRANTINGHAM COMPANY
- A vintage Rockford machine shop manufacturing history project.
- A vintage Rockford machine shop manufacturing history project.
- A vintage Rockford machine shop manufacturing history project.
- Brad's vintage gas engine governor project.
- Tractor and Gas Engine Review
- Chilton Tractor Index history.
- Tractor and Gas Engine Review.
- The American Thresherman for Farm Power Users.
- Farm Implement News.
- Circa 1923.