World conservation Strategy. 

 - Gland, Switzerland :  IUCN,  1980. 
 - 55 p ;  30 cm. 
<br/><br/>Includes bibliographica reference. 
<br/><br/> open access. 
<br/><br/><label>LCCN: </label>85242326  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental policy.<br/>Conservation of natural resources--Economic aspects.