The state of the environment / 
Organisation for Economic Co-operation and Development. 
 - Paris:  OECD,  1999. 
 - 177 p.:  il., mapas;  24 cm. 
<br/><br/><br/>Ingles 
<br/><br/><label>ISBN: </label>9264119469  Normal 
<br/><br/><label>Dewey Class. No.: </label>333.7