Renton, R. N. <br/><br/>
Telecommunications principles / 
by R. N. Renton 
 - [2nd ed.] 
 - London :  New Era Pub.,  1958 
 - xiii, 448 p. :  ill. ;  26 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label> PND 3.25 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication
<br/><br/><label>Dewey Class. No.: </label>621.38.