HARRIS Robert <br/><br/>
Voices of the code breakers :  personal accounts of the secret heroes of World War II / 
Michael Paterson ; foreword by Robert Harris. 
 - United Kingdom :  David & Charles,  2008 
 - 352 p. :  ill. 
<br/><br/><label>ISBN: </label>9780715327197 (pbk) :  29.82 SGD 
<br/><br/><label>Subjects--Topical Terms: </label><br/>SECOND WORLD WAR--SIGNALS INTELLIGENCE<br/>CODE BREAKERS