Friedman, William F. (William Frederick), <br/><br/>
Elements of cryptanalysis / 
Friedman, William F. (William Frederick), 
 - USA  Aegean park Press 
 - 172 
<br/><br/>Part.1. The Analysis of Ciphers (Page 1-6), Part.2. The Analysis of Codes (Page 84-91). 
<br/><br/><label>ISBN: </label>0894120026 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Elements of cryptanalysis
<br/><br/><label>Dewey Class. No.: </label>001.5436,FRI