- McLean County Historical Society, Bloomington, Ill; Hartzold, Susan; Matejka, Michael, 1953-
- University of Illinois at Urbana-Champaign, University Library
The Brokaw Plow Shop perfected the 'Bloomington Clipper Plow,' an effective tool for turning prairie soil. Because McLean County had such a high agriculture population, related businesses were often successful. How we learn about communities; Picture Book on Illinois Agricultural History. 16 History; 13 Science, Technology and Society; 15 Economics; 18 Social Systems.
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