Perman, Roger. <br/><br/>
Natural Resource and Environmental Economics / 
Roger Perman....(et al.). 
 - 3rd ed. 
 - Harlow, England :  Pearson/Addison Wesley,  c2003. 
 - xxv, 699 p. :  ill. ;  25 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographic references. 
<br/><br/><label>ISBN: </label>0273655590 9780273655596 
<br/><br/><label>Dewey Class. No.: </label>333.7  / PER