Perman, Roger <br/><br/>
Natural resource and environmental economics/Perman, Roger 

 - 2nd ed. 
 - Essesx  Pearson education limites  1999 
 - 564p. 
<br/><br/><label>ISBN: </label>9780582368767 
<br/><br/><label>Dewey Class. No.: </label>