McKay, Sinclair <br/><br/>
Bletchley Park brainteasers  

 - London     Headline  2017 
<br/><br/><label>ISBN: </label>978 1 472 25260 9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PUZZLES
<br/><br/><label>Dewey Class. No.: </label>793 73 MCK