PERERA, N.Punyasiri <br/><br/>
Early agricultural settlements in Sri Lanka in relation to natural resources / 
by N.Punyasiri Perera 
 - [s.l.]  [s.n.]  0 
 - 59-73 p. 
<br/><br/><label>ISBN: </label>57514 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environment-Protection
<br/><br/><label>Dewey Class. No.: </label>333.7  / PER