- The Clilton Tractor Journal.
- Tractor and Gas Engine Review.
- The American Thresherman for Farm Power Users.
- Tractor and Gas Engine Review.
- Tractor and Gas Engine Review.
- Tractor and Gas Engine Review.
- How do farm tractor engines governor the fuel?
- Circa 1923.
- Farm Implement News.
- The American Thresherman for Farm Power Users.
- Tractor and Gas Engine Review.
- Chilton Tractor Index history.
- Emerson-Brantingham Company.
- A vintage Rockford machine shop manufacturing history project.
- A vintage Rockford machine shop manufacturing history project.