The McCormick Reaper. University of Virginia Department of Astronomy. (1996-2002). Last Updated: Thursday, July 4, 2002.
< http://www.astro.virginia.edu/research/observatories/26inch/history/reaper.html >
Last Retrieved: Wednesday, January 15, 2003

Agriculture in the Classroom | Cyrus McCormick. Agriculture Heroes. (n.d.) Last Updated: (n.d.)
< http://www.txfb.org/AgClass/resource/AITCrg34.htm >
Last Retrieved: Wednesday, January 15, 2003

Mechanical Reaper. The Invention Dimension. (March 2000). Last Updated
< http://web.mit.edu/invent/www/inventorsI-Q/mccormick.html >
Last Retrieved: Wednesday, January 15, 2003

Cyrus Hall McCormick: Inventor and Industrialist. ILLINOIS PERIODICALS ONLINE (IPO) PROJECT (n.d.) Last Updated: (n.d.)
< http://www.lib.niu.edu/ipo/ihy000446.html >
Last Retrieved: Wednesday, January 15, 2003

Visuals:

N.C. Wyeth The World's&nbsp; First Reaper... undated calendar top. The-Antique-Shop.com. (n.d.) Last Updated: (n.d.) < http://www.the-antique-shop.com/inventory/ calendars/grain.jpg > Last Retrieved: Wednesday, January 15, 2003