- McLean County Historical Society, Bloomington, Ill
- University of Illinois at Urbana-Champaign, University Library
This drawing shows a yoke of oxen plowing a field. Prairie breaking went on for nearly 50 years in McLean County. Many different systems were used and multiple yokes of oxen were common. How we learn about communities; Communities and Geography; American Communities in History. 15 Economics; 16 History; 18 Social systems.
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