Physical networks 

 - Walton Hall  ; The Open University Press  , 1981 
 - 64p. 
<br/><br/><label>ISBN: </label>0335170617  £4.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer Networking<br/>Computer Science<br/>Networking
<br/><br/><label>Dewey Class. No.: </label>004.6  / PHY