Herman J. Helgert <br/><br/>
Integrated Services Digital Networks:   Architech Protocols and  Standards 

 - New York  Addisons-Wesley  1991 
 - xiv, 449p. 
<br/><br/><label>ISBN: </label>0201525011 
<br/><br/><label>Source: </label> 1995-294 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Integrated services digital networks
<br/><br/><label>LC Class. No.: </label>TK5103.7  / .H46 1991