Permission to Dr. Sen, Director, Bengal P.H. Laboratory and to Rao Bahadur Govinda Raju, Superintendent, Bengal Vaccine laboratory.  
 File No.  2B-47/40 

 -  1940 
 - 9 P.  H-35 cm; W-22 cm 
<br/><br/> সচিবালয় রেকর্ডরুম সংগ্রহ (প্রথম পর্যায়) <br/><br/> 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Vaccine