Stallings William Ed. <br/><br/>
Data and computer communications 

 - 6 
 -  2000 
<br/><br/><label>Standard No.: </label>9061 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>D6,8(B),4, P0