Roddy, Dennis <br/><br/>
Electronic communications / 
Dennis Roddy and John Coolen 
 - 4th ed. 
 - New Delhi :  Pearson Education/Prentice-Hall,  c1995. 
 - ix, 820 p. :  ill. ;  26 cm. 
<br/><br/><label>ISBN: </label>8131705110 
<br/><br/><label>LCCN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication
<br/><br/><label>LC Class. No.: </label>TK5101  / .R56 1995 
<br/><br/><label>Dewey Class. No.: </label>621.382  / R686e