DAVIES, D. W. <br/><br/>
Security for computer networks  an introduction to data security in teleprocessin 
D. W. DAVIES 
 - 2nd ed. 
 - Chichester  John Wiley  1989 
 - xx,377p. 
 - Wiley series in communications in distributed systems .
<br/><br/><label>ISBN: </label>0471921378 
<br/><br/><label>Dewey Class. No.: </label>005.8 D286S-2