Fraser, W <br/><br/>
Telecommunications 

 - Ed.2 
 - London  ELBS  1970 
 - 804p. 
<br/><br/><label>ISBN: </label>35603772X 
<br/><br/><label>Subjects--Index Terms: </label>Telecommunication 
<br/><br/><label>Universal Decimal Class. No.: </label>621.39  / FRA