Penfold, R. A. <br/><br/>
An introduction to computer communications  [Books]. 
R.A. Penfold. 
 - Shepherds bush road, London  Bernard Babani pub.Ltd.  1986 
 - Pages: 72. 
<br/><br/><label>ISBN: </label>0859341518  0.00 
<br/><br/><label>Subjects--Personal Names: </label><br/>Computer networks.
<br/><br/><label>Dewey Class. No.: </label>TK/5105.5  / PEN