Principles of environmental economics and sustainability: An integrated economic and ecological approach/ 
Hussen, Ahmed 
 - 3rd ed. 
 - New York:  Routledge,  2013. 
 - 417 
<br/><br/><label>ISBN: </label>0415676908 
<br/><br/><label>Dewey Class. No.: </label>333.7  / HUS/P