Twelfth triennial report on vaccination in Bengal :   for the years 1920-21, 1921-22 and 1922-23 / 
Government of Bengal. 
 - Calcutta :  Bengal secretariat book depot   1923 
 - various p.  31 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics
<br/><br/><label>Dewey Class. No.: </label>315.4  / GOT,1923.