FRIEDMAN William F <br/><br/>
Advanced military cryptography 

 - Laguna Hills, Calif.:  Aegean Park Press,  1976 
 - 113p. 
<br/><br/><label>ISBN: </label>0894120115 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CIPHER MACHINES<br/>CODE SYSTEMS<br/>CODES<br/>CRYPTOGRAPHY<br/>MILITARY INTELLIGENCE