World of learning <br/><br/>
The world of learning 1976 - 77 

 - 27th ed. 
 - London  Europa publication  1976 
 - xv, 1014 p. 
<br/><br/><label>ISBN: </label>900362979 
<br/><br/><label>Dewey Class. No.: </label>60  / WOR