Sinkov, Abraham,   1907- <br/><br/>
Elementary cryptanalysis :   a mathematical approach / 
Abraham S inkov. 
 - [New York] :   Yale University,   [c1968] 
 - ix, 189 p. :   ill. ;   23 cm. 
 - New mathematical library,   22 .
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>LCCN: </label>72-089953 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Cryptography-- Mathematics.<br/> Ciphers.
<br/><br/><label>Dewey Class. No.: </label>652.8 3 23