Wells, David. <br/><br/>
The Penguin book of curious and interesting puzzles / 
by David Wells. 
 - 1st ed. 
 - London :  Penguin Books,  1992. 
 - 382 p. :  ill ;  20 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical recreations.