Cost of cultivation of agricultural crops  Yala 1990 

 - Peradeniya  Division of agricultural economics and projects  1991 
 - v,50p.  28cm 
 - Agricultural economics study No. 46 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics<br/>Agriculture<br/>Production
<br/><br/><label>Dewey Class. No.: </label>338.1  / COS