Introduction of a private Branch Exchange for all telephones in writers Buildings.  
 File No.  1T-28/41 (Part) 

 -  1941 
 - 07 p;   H-35 cm; W-22 cm 
<br/><br/> সচিবালয় রেকর্ডরুম সংগ্রহ (প্রথম পর্যায়) <br/><br/> 
<br/><br/><label>Subjects--Topical Terms: </label><br/> writers --Buildings