Sri Lanka. Department of Agriculture <br/><br/>
Cost of cultivation of agricultural crops - Yala 1983 ; Vol. I & II 
Sri Lanka. Department of Agriculture 
 - Peradeniya  Department of Agriculture  1984 
 - 64p. ; 20cm 
 - Agricultural Economics Study  36 .
<br/><br/> Vol. I Paddy Vol. II Other Field Crops 
<br/><br/><label>Dewey Class. No.: </label>338.1  / SRI