Shay, William A. <br/><br/>
Understanding data communications and networks / 
William A. Shay. 
 - 3rd ed. 
 - London :  Europe,  2004. 
 - xxv, 766 p. 
<br/><br/><label>ISBN: </label>9812549668 :  KES 2,700 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data trasmission systems.
<br/><br/><label>LC Class. No.: </label>TK5105  / .S53 2004