Bocker, Peter <br/><br/>
ISDN the integrated services digital network : concepts, methods, systems 
by Peter Bocker 
 - Berlin  Springer-Verlag  1988 
 - xi, 250p. 
<br/><br/><label>ISBN: </label>354017446 
<br/><br/><label>Dewey Class. No.: </label>621.382  / N88