Ryan, John C., <br/><br/>
Life support :  Conserving biological diversity / 
John c. ryan ; vicki elkin, research assistant ; ed ayres, ed. 
 - 62 páginas 
 - Worldwatch paper ;  no. 108 .
<br/><br/><label>ISBN: </label>0878071092 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecología<br/>Biodiversidad
<br/><br/><label>LC Class. No.: </label>QH84  / R93