Staggered Cultivation of Paddy :  A Case Study of Ampara District /  English. 
Ministry of Agriculture, Lands and Forestry. 
 - Colombo :  Ministry of Agriculture, Lands and Forestry.  1972. 
 - ii, 56 p.:  ill. maps ;  30cm. 
<br/><br/><label>Dewey Class. No.: </label>X633.18(076-5)  / SRI