Pirapaharan <br/><br/>
An economic evaluation of the adoption of intergrated pest management in paddy farming 
/ V.Pirapaharan 
 -  University of Jaffna (A research report)  1999 
 - vii  ,(66 p) 
<br/><br/><label>ISBN: </label>kkk hhyuuuu 
<br/><br/><label>Dewey Class. No.: </label>