Kessler, G <br/><br/>
Isdn:concepts,fcilities:and services 

 - 3rd edition. 
 - New Delhi  :  Mcgraw-Hill Publication,  1996. 
 - xxiv,672 
<br/><br/><label>ISBN: </label>0-07-114430-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer EngineeringInformation Technology
<br/><br/><label>Dewey Class. No.: </label>004.6  / KES