Raven, Peter H. <br/><br/>
The urgency of tropical conservation. 

 - New York-US :   The nature conservancy,   1986. 
 - páginas 7-12 :   ilustraciones full color 
 - Irregular 
 - Vol. 36, no.1 (Jan/Mar 1986) 
 - The nature conservancy news ;   no.1 .
 - The nature conservancy news. .