WILLRICH(TED L); SMITH(GEORGE E) <br/><br/>
Agricultural Practices and Water Quality 

 -  1970  Iowa State University Press, Iowa 
 - 1-415.  0  Paper 
<br/><br/> Hard Binding 
<br/><br/><label>ISBN: </label>0-8138-1745-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil & Water Conservation
<br/><br/><label>Dewey Class. No.: </label>DT2:8        L0