Nature's Services  : societal dependence on natural ecosystems 
edited by Gretchen C. Daily 
 - Washington  Island Press  1997 
 - 392 p.  24 cm 
<br/><br/><label>ISBN: </label>1559634766 
<br/><br/><label>Subjects--Index Terms: </label>Biodiversidad Economia ambiental Ecosistema Medio ambiente