Ecology and conservation / ecologie et conservation 
Unesco Paris 
 - Paris :  Unesco,  1971 
 - 706 p. :  illus. ;  27 cm. 
 - Ecology and conservation. Écologie et conservation, 1 .
 -  1. Ecology and conservation, .
<br/><br/> "SC.68/XXIV.1/AF."  English and French. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology--Congresses.--Arctic regions
<br/><br/><label>Dewey Class. No.: </label>574.5260911  / ECO 1971