Smith J.R.G. <br/><br/>
Elemantry  telecommunication practice/ 
J.R.G.Smith. 
 - London:.  ELBS,  c1967. 
 - xi,319 p.  ill,table,figs,photos.  18 cm. 
<br/><br/> includes index. 
<br/><br/>
<br/><br/><br/>English 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication, communication,
<br/><br/><label>Dewey Class. No.: </label>621.385/SME