Roddy, Dennis <br/><br/>
Electronic communications   [Book] 
Dennis Roddy. 
 - 4th Ed. 
 -  Pearson Education Singapore 
<br/><br/> All. 
<br/><br/><label>ISBN: </label>8129701065 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunications
<br/><br/><label>Dewey Class. No.: </label>621.382