- McLean County Historical Society, Bloomington, Ill
- University of Illinois at Urbana-Champaign, University Library
A Cat Challenger grain cart and 9600 John Deere tractor harvest corn near Shirley, Illinois, in October 1995. Today with combines, farmers can expect to harvest 100 acres of corn a day. How we learn about communities. 13 Science, Technology and Society; 15 Economics; 17 Geography.
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