Butler , M. D. <br/><br/>
Conserving soil 

 - New York  Van Nostrand Reinhold  1969 
 - 321p. 
<br/><br/> Includes Index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil Conservation
<br/><br/><label>Dewey Class. No.: </label>631.4  / B98C