Helgert, Hermann J. <br/><br/>
Integrated services digital networks :  architectures, protocols, standards 

 - Massachusetts :  Addison-Wesley,  1991 
 - 449 p. :  il. 
<br/><br/><label>ISBN: </label>0201525011 
<br/><br/><label>Subjects--Topical Terms: </label><br/>REDES DIGITALES DE SERVICIOS INTEGRADOS
<br/><br/><label>Dewey Class. No.: </label>621.382  / H474