Perman, Roger. <br/><br/>
Natural Resource and Environmental Economics 

 - 4th ed.  
 - England:   Addison-Wesley,  21 July 2011. 
 - xxiii, 712 p. :   Colour ill. ;  24.7 Cm. 
<br/><br/><label>ISBN: </label>9780321417534 
<br/><br/><label>Dewey Class. No.: </label>333.7 PER