Gardner, Martin <br/><br/>
Entertaining Mathematical Puzzles 
Martin Gardner 
 - New York :  Dover Publications,  c1961. 
 - ix, 112 p.:  ill.; 
<br/><br/><label>ISBN: </label>9780486252117 
<br/><br/><label>Dewey Class. No.: </label>793.74  / GAR/ENT