Wells, David. <br/><br/>
The penguin dictionary of curious and interesting numbers / 
David Wells. 
 - Revised ed. 
 - London :  Penguin,  1997. 
 - xix, 231 p. 
<br/><br/><label>ISBN: </label>0140261493 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Numeration.