The united nations environment programme. <br/><br/>
World resources :  a guide to the global environment. 

 - ed. 
 - New york :  Oxford,  1990. 
 - 383  p. ;    cm. 
<br/><br/>index. 
<br/><br/><label>ISBN: </label>9780195062298 :  $ 
<br/><br/><label>Subjects--Topical Terms: </label><br/>world resources.