Sirisena ,N.L. <br/><br/>
Multispectral Model Of Production For Sri Lanka /   English. 
N.L Sirisena . 
 - Ceylon :  Central Bank ,  1976. 
 - 275p.:  ill.;  24cm. 
<br/><br/><label>Dewey Class. No.: </label>338.5493  / SRI