Held, R. Burnell  <br/><br/>
Soil conservation in perspective / 
R. Burnell Held ; Marion Clawson 
 - Baltimore :  Jones Hopkins Press,  1965 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil erosion--Soil conservation<br/>Agricultural land conservation--Techniques, equipment, materials
<br/><br/><label>Dewey Class. No.: </label>631.45  / HEL