Annual report on the chemical examiner's department, Bengal for 1920 /     
Government of Bengal. 
 - Calcutta :  Bengal secretariat book depot  1921 
 - 7p.  31cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemical technologists - Report 
<br/><br/><label>Dewey Class. No.: </label>660.092  / GOA 1921