The environment :  challenges for the '80s / 
Organisation for Economic Co-operation and Development. 
 - París:  OECD,  1981. 
 - 51 p. ;  24 cm. 
<br/><br/><br/>Ingles 
<br/><br/><label>ISBN: </label>9264122494  Normal 
<br/><br/><label>Dewey Class. No.: </label>333.7