Kahn, David,  1930- <br/><br/>
The reader of gentlemen's mail  Herbert O. Yardley and the birth of American codebreaking /  [electronic resource] : 
David Kahn. 
 - New Haven :  Yale University Press,  c2004. 
 - xxi, 318 p. :  ill. 
<br/><br/>Includes bibliographical references (p. 291-304) and index. 
<br/><br/><br/>Electronic reproduction. Ann Arbor, MI : ProQuest, 2015. Available via World Wide Web. Access may be limited to ProQuest affiliated libraries. 
<br/><br/><label>ISBN: </label>
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<br/><br/><label>Subjects--Personal Names: </label><br/>Yardley, Herbert O. 1889-1958. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cryptographers--United States--Biography.<br/>World War, 1914-1918--Cryptography.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Electronic books.
<br/><br/><label>LC Class. No.: </label>UB271.U52  / Y374 2004 
<br/><br/><label>Dewey Class. No.: </label>940.4/8673/092  B