Willrich Ted L Ed. <br/><br/>
Agricultural practices and water qulity 
Willrich Ted L Ed.; Smith George E Ed. 
 - Iowa  Iowa State University          1970 
 - xxvii, 415p.  cm. 
<br/><br/> Bib chapterwise 
<br/><br/><label>ISBN: </label>0813817455 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture Labour
<br/><br/><label>Dewey Class. No.: </label>X9(J):(G:555), L0