- McLean County Historical Society, Bloomington, Ill; Walters, William D, Jr., 1942-
- University of Illinois at Urbana-Champaign, University Library
This advertisement from the Illinois Silo and Tractor company promotes a demonstration of a tractor that plows, plants, harrows, and discs the corn. In order for new farm machinery to be seen, sellers had to hold demonstrations that educated farmers on the machines' capabilities. How we learn about communities. 16 History; 13 Science, Technology and Society; 15 Economics; 18 Social Systems.
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