Gardner, Martin, <br/><br/>
Gardner's workout :  training the mind and entertaining the spirit / 
Martin Gardner. 
 - Natick, Mass. :  A.K Peters,  2001. 
 - xi, 319 p. :  ill. ; 
<br/><br/><label>ISBN: </label>1568811209 
<br/><br/><label>Subjects--Index Terms: </label>Mathematical recreations 
<br/><br/><label>Universal Decimal Class. No.: </label>51-8  / GAR