Freer, John R. <br/><br/>
Computer communications and networks / 
John R.Freer 
 - New York :  Plenum Press,  1988 
 - 432 p. :  ill. ;  26 cm. 
<br/><br/><label>ISBN: </label>0306429748 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks