Kessler G.C.  <br/><br/>
ISDN  Second Edition 

 - New York  Mc Graw Hill  1993 
 - 454 
<br/><br/><br/>ENGLISH 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>ISDN
<br/><br/><label>Dewey Class. No.: </label>621.382  / KES