"Halberg, Niels" <br/><br/>
Organic Agriculture for Sustainable Livelihoods 

 - \\201301ENGGPSX 
 - Earthscan   2013  London  
 - 280p.  
<br/><br/> includes index and biblioraphy 
<br/><br/><label>ISBN: </label>9.78E+12