A study of the effectiveness of hand pump maintenance system in Sri Lanka special reference to Southern province 
Fernando, C.C.H.S. 
 -  2008. 
 - xi,73p. 
<br/><br/> HalwathuraR.U, & Medagama, S. 
<br/><br/><label>Gov. Doc. Class. No.: </label>MPM/T/089