Norman, D. Douglas, M. <br/><br/>
Farming Systems Developments and Soil Conservation 

 - Food and Agriculture Organization of the United Nations  1994 
 - 173p. 
<br/><br/><label>ISBN: </label>92-5-103448-6 
<br/><br/><label>Nat. Bib. No.: </label>6699 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture
<br/><br/><label>Universal Decimal Class. No.: </label>630  / DAV