Gunawardana, A.M.T.  Chandrasiri, A. <br/><br/>
Training and Visit System of Extension 

 - Agrarian Research and Training Institute (ARTI)  Colombo  1981 
 - 47p. 
<br/><br/><label>Nat. Bib. No.: </label>5102 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture
<br/><br/><label>Universal Decimal Class. No.: </label>631.15  / 5102