- W. F. & JOHN BARNS MANUFACTURING COMPANY IN ROCKFORD, ILL. Circa 1900.
- W. F. & JOHN BARNS MANUFACTURING COMPANY IN ROCKFORD, ILL. Circa 1924.
- A BARBER-COLMAN COMPANY ADVERTISEMENT.
- A BARBER-COLMAN COMPANY ADVERTISEMENT.
- Ingersol Milling Machine Company history.
- Ingersol Milling Machine Company history.
- Ingersol Milling Machine Company history.