Study on social security of rural elderly people 
Palitha, S.D.N.A. 
 -  2008. 
 - xi,91p.: 
<br/><br/> Wijekoon, W.M.M.G.D., & Jayasekara, K.M.S.D. 
<br/><br/><label>Gov. Doc. Class. No.: </label>MPM/T/63