Martin , Gardner <br/><br/>
Penrose tiles to trapdoor ciphers 

 - NA 
 - New York:  W. H. Freeman  ,1989. 
 - viii,326p.  NA  Original 
<br/><br/> NA 
<br/><br/><label>ISBN: </label>76101986 
<br/><br/><label>Subjects--Personal Names: </label><br/>Humanities & Natural Science
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arts and Recreation
<br/><br/><label>Dewey Class. No.: </label>793.74 MAR