Alvappillai, Ponniah <br/><br/>
Sitting Standard and Quality Control of Black Chewing Tobacco Production (Niicotiana Tabacum)coti 

 - Jaffna:  University of Jaffna,  2010 
 - xxx, 317 p. 
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<br/><br/><label>Dewey Class. No.: </label>630  / ALV