Das, P. N. <br/><br/>
Carrier Current Engineering: Including Long Distance Telephony 

 - Calcutta  Modern Book Agency  1977 
 - 199p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Long Line Transmission<br/>Electric Wave<br/>Carrier Telephone System
<br/><br/><label>Dewey Class. No.: </label>621.382 D229C