Use of Telephone System in Calcutta for Setting up laud speakers in certain ports of Calcutta for the Transmission of A.R.P and Civil Defense Information.  
 File No.  Pub-3T-15/42 

 -  1942 
 - 25 p.  H-35 cm; W-22 cm. 
<br/><br/> সচিবালয় রেকর্ডরুম সংগ্রহ (প্রথম পর্যায়) <br/><br/> 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Use --Telephone