Desertification how people make deserts how people can stop and why they don't  
Alan Grainger 
 - Washington  The world bank 
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<br/><br/><label>ISBN: </label>0905347374 
<br/><br/><label>Subjects--Topical Terms: </label><br/>D
<br/><br/><label>Dewey Class. No.: </label>333.736  / GRA