Perman, Roger. <br/><br/>
Natural resource and environmental economics / 
Roger Perman, Yue Ma, James McGilvray. 
 - London :  Longman,  1996. 
 - ix, 396 p. 
<br/><br/><label>ISBN: </label>0582257271 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental economics.
<br/><br/><label>LC Class. No.: </label>HC79  / .E5P47