Clark D D <br/><br/>
Protection of information in computer systems 

 - Washington  IEEE           1975 
 - 260p.  cm. 
<br/><br/><label>Standard No.: </label>31170 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>D65,8(B), L58