How much is an ecosystem worth? :  assessing the economic value of conservation / 
IUCN, the Nature Conservancy, the World Bank. 
 - Washington, D. C :  World Bank,  2005. 
 - ix, 33p :  ill. ;  28 cm. 
<br/><br/> Available on the Internet.  Viewed: 01/13/2005. 
<br/><br/>Includes bibliographical references (p.31-33) 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0821363786 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental protection--Economic aspects.<br/>Environmental policy--Economic aspects.