IUCN Red List Categories and Criteria Version 3.1 

 - Cambridge  2001 
 - 30 
<br/><br/><label>ISBN: </label>2-8317-0633-5 
<br/><br/><label>Subjects--Index Terms: </label>Ecology IUCN RED LIST 
<br/><br/><label>Dewey Class. No.: </label>639.9