WELCH, SAMUEL <br/><br/>
SIGNALLING IN TELECOMMUNICATIONS NETWORKS 

 - S.E. 
 - LONDON Reino Unido  PETER PEREGRINUS  1979 
 - 386 
<br/><br/><label>ISBN: </label>0906048044 
<br/><br/><label>LCCN: </label>23562 
<br/><br/><label>Dewey Class. No.: </label>621.38043