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The development of grassed waterways in the late 1930s revolutionized the appearance of the Cornbelt. Grassed waterways not only acted as barriers between fields, but they also allowed for drainage of water. How we learn about communities; Communities and Geography; American Communities in History 15 Economics; 16 History; 18 Social systems
|McLean County Historical Society, Bloomington, Ill|
|University of Illinois at Urbana-Champaign|
|University of Illinois at Urbana-Champaign, University Library|
|McLean County, Illinois|
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