BELLAMY, JOHN C <br/><br/>
DIGITAL TELEPHONY  

 - 3 ed. 
 - NEW YORK  JOHN WILEY AND SONS PVT. LTD.  2003 
 - 643 
<br/><br/><label>ISBN: </label>9-814-12635-7 
<br/><br/><label>Dewey Class. No.: </label>621.385 O 03 BEL