Communication News   dealing with technical problems, processess & investigations on transmitters, transmitting valves, line telephony, line telegraphy, high frequency generators. /  

 - Hilversum :   Philips telecommunication industries,   1947-.  
 -  [30] cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telekomunikacja<br/>Transmisja