World of Learning / 

 - London :  Europa Publications,  2001. 
 - xv, 2188 p. :  ill. ; 
<br/><br/>14(1990), 43(1993), 46(1996), 51(2001), 54(2004)th editions 
<br/><br/><label>ISBN: </label>1857430840 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Directory<br/>Learning
<br/><br/><label>Dewey Class. No.: </label>R 060  / WOR P00W