Roddy, Dennis. , <br/><br/>
Electronic communications / 
Dennis Roddy, John Coolen. 
 - 4th ed. 
 - ix, 820 pages :  illustrations ;  26 cm. 
<br/><br/><label>ISBN: </label>013312083X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication.
<br/><br/><label>LC Class. No.: </label>TK5105   / .R62 1995