Gardner, Martin,  1914- <br/><br/>
Sixth book of mathematical games from Scientific American / 
Martin Gardner. 
 - San Francisco:  W. H. Freeman,  1971. 
 - 262 p. :   ill. (part col.) ;   23 cm. 
<br/><br/> The fifth collection was published under title: The unexpected hanging and other mathematical diversions. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0716709449 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical recreations