Townsend, Charles Barry <br/><br/>
World's hardest puzzles 

 -  New Delhi : Orient,   2000 
 - 127 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Puzzles
<br/><br/><label>Dewey Class. No.: </label>793.73  TOW;1 `R1'