WEL WIIZSACKER;ERNEST BON  <br/><br/>
FACTOR FOUR  DOUNLING WEALTH HALVING RESOURCE USE 

 - LONDON  LTD  2005 
 - 322 
<br/><br/><label>ISBN: </label>185383407.6 
<br/><br/><label>Dewey Class. No.: </label>333.516