Halsall, Fred. <br/><br/>
Data communications, computer networks and open systems / 
Fred Halsall. 
 - 4th ed. 
 - Delhi :  Pearson,  1996. 
 - 915 p. 
<br/><br/><label>ISBN: </label>8178080982 :  KES 3,500 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data communications.<br/>Computer networks.