Helgert, Hermann J. <br/><br/>
Integrated Services Digital Networks Architectures Protocols Standards  

 - Reading, Massachusetts :   Addison-Wesley,   c1991 
 - XIV, 449 p.  : ill 
<br/><br/>
<br/><br/><label>ISBN: </label>0201525011 
<br/><br/><label>ISSN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Integrated Services Digital Networks
<br/><br/><label>Dewey Class. No.: </label>621.382  / HEL