Wanninayaka, P.B. <br/><br/>
සංවර්ධන පරිපාලනය 
= sanwardhana paripalanaya 


 - Colombo:  Sanwardhana Paripalana Ayatanaya,  1991. 
 - vii,230p.;  21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Land Economics<br/>Economics
<br/><br/><label>Dewey Class. No.: </label>333.715  / WAN