මහවැලි සංවර්ධන යෝජනා 
 Mahaweli sanvardana yojanaa 

 -  ministry of Irrigation electricity and road  1968 
 - 154p.,pl.,  26 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Polonnaruwa <br/>Irrigation
<br/><br/><label>Universal Decimal Class. No.: </label>(x)626.81  / MAH