Roddy, Dennis <br/><br/>
Electronic communications 
Dennis Roddy and John Coolen 
 - 4th ed. 
 - Englewood Cliffs, N.J.  Prentice-Hall  1995 
 - ix, 820 p. : ill. ; 26 cm. 
<br/><br/><label>ISBN: </label>013312083X  RM 181.56 
<br/><br/><label>LCCN: </label>94-14041 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication