Vout, Colin and Gray, Gordon <br/><br/>
Challenging Puzzles 

 -  Cambridge University Press  1993 
 - 126 
<br/><br/> This book contains a collection of original puzzles of a truly challenging nature… 
<br/><br/><label>ISBN: </label>0-521-44602-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Juvenile Non-Fiction / Mathematical Recreation / Puzzles