Collin, S. M. H <br/><br/>
Bloomsbury crossword key 

 - 2nd ed 
 - London:  Penguin,  2004 
 - 896 p 
<br/><br/><label>ISBN: </label>9780747572244 
<br/><br/><label>Dewey Class. No.: </label>793.73203 COL