Kahn, David <br/><br/>
The Codebreakers:  The story of secret writing 
 Story of secret writing 
David Kahn 
 - [Rev. ed.] 
 - New York  Scribner  c1996 
 - xviii, 1181 p  ill  25 cm 
<br/><br/> Contine Bibliografie si Index 
<br/><br/><br/>eng 
<br/><br/><label>ISBN: </label>0684831309 (alk. paper) 
<br/><br/><label>LCCN: </label>96031318 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cryptography--History
<br/><br/><label>Dewey Class. No.: </label>652.8