1. Wayne G. Broehi, Jr., John Deere's Company: A History Of Deere And Company And Its Times,  (New York: Doubleday and Company, 1984), 403.

2. Waterloo Courier, 23 March 1918.

3. Waterloo Courier, 31 December 1929.

4. Robert Leavin, Deere History, (Grout Museum, Waterloo Iowa), located in the scrapbook file.