Gunasena, H. P. M.  <br/><br/>
Integrated farming systems 

 - iii,99p.  23cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CULTIVATION AND HARVESTING<br/>SPECIAL METHODS OF CULTIVATION
<br/><br/><label>Dewey Class. No.: </label>631.58  / INT