National Library. Calcutta. <br/><br/>
Indian Scientific And Technical Publications Exhibition 

 - New Delhi  C.S.G.I.R.  1960 
 - xii,198, 195p 
<br/><br/><label>Subjects--Topical Terms: </label><br/>14:12
<br/><br/><label>Dewey Class. No.: </label>14:12  / Jo