- McLean County Historical Society, Bloomington, Ill; Hartzold, Susan; Matejka, Michael, 1953-
- University of Illinois at Urbana-Champaign, University Library
The Illinois Tractor Company in Bloomington promised "the lowest priced tractor in the world. Tractors began to emerge in McLean County in the early 20th century, with metal wheels precluding rubber tires. How we learn about communities. 16 History; 13 Science, Technology and Society; 15 Economics; 18 Social Systems.
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