Kessler, Gary C <br/><br/>
ISDN:   Concepts, facilities, and services 

 - New York:   McGraw-Hill Inc,   1990 
 - xvi, 302p. 
<br/><br/><label>ISBN: </label>0-07-034242-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ISDN
<br/><br/><label>Subjects--Index Terms: </label>ISDN services 
<br/><br/><label>Universal Decimal Class. No.: </label>D 681.324:621.39  / N0