Biodiversity indicators for policy-makers / 
Walter V. Reid ... [et al.] 
 - Baltimore :  World Resources Institute,  1993 
 - 42 p. :  ill. ;  28 cm. 
<br/><br/>Includes bibliographical references (p. 39-42) and index 
<br/><br/><label>ISBN: </label>1569730008  RM33.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biological diversity