The world book Encyclopaedia. 

 - Chicago :  Oxford University Press,  1961. 
 - Vols. :  ill. ;   24 cm. 
<br/><br/>V. 2- Natural history ;  
<br/><br/>300  300 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopaedia. 
<br/><br/><label>Dewey Class. No.: </label>031 / W893