Gaines, Helen Fouche <br/><br/>
Cryptanalysis  a study of ciphers and their solution 

 - New York  Dover  1958 
 - vi,237p.  23 cm. 
<br/><br/><label>ISBN: </label>0486200973 
<br/><br/><label>Dewey Class. No.: </label>005.82,D,gai  / _