Wells, David. <br/><br/>
The penguin dictionary of curious and interesting numbers / 
David Wells. 
 - Harmondsworth, England :  Penguin Books,  1986. 
 - 229 p. 
<br/><br/><label>ISBN: </label>0140080295 
<br/><br/><label>LCCN: </label>55052271     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Number theory--Dictionaries.