Kahn, David <br/><br/>
The reader of gentlemen's mail : Herbert O. Yardley and the birth of American codebreaking 
David Kahn 
 - New Haven  Yale University Press  2004 
 - xxi, 318 p. : ill. ; 25 cm 
<br/><br/> Includes bibliographical references (p. 291-304) and index 
<br/><br/><label>ISBN: </label>9780300098464 
<br/><br/><label>ISSN: </label>2003060029 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cryptographers - United States - Biography<br/>World War, 1914-1918 - Cryptography<br/>Yardley, Herbert O. (Herbert Osborn), 1889-1958
<br/><br/><label>Dewey Class. No.: </label>940.48673092 KAH