Roddy, Dennis. , <br/><br/>
Electronic communications / 
Dennis Roddy, John Coolen. 
 - 3rd ed. 
 - xii, 788 pages :  illustrations ;  24 cm. 
<br/><br/><label>ISBN: </label>0876923961 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication.
<br/><br/><label>LC Class. No.: </label>TK5105   / .R62 1984