Trimble, Stanley Wayne. <br/><br/>
Historical Agriculture and Soil erosion in the Upper Mississippi Valley hill country / 
Stanley W. Trimble. 
 - Boca Raton:  CRC;  2013. 
 - xlviii, 242 pages :  [hb] 
<br/><br/><label>ISBN: </label>9781466555747 (hardcover : alk. paper) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil erosion--History--Driftless Area--19th century..<br/>Soil erosion--History--Driftless Area--20th century..<br/>Agriculture--Environmental aspects--History--Driftless Area--19th century.<br/>Agriculture--Environmental aspects--History--Driftless Area--20th century.
<br/><br/><label>Dewey Class. No.: </label>R-631.45  / TRI-H