Mendis, D.L.O. <br/><br/>
	Annual sessions of the Sri Lanka Association for the advancement of science <br/><br/>
Evolution and development of water and soil conservation ecosystems - from ancie 
/ D L. O Mendis 
 - [S.l]  Sri Lanka Pugwash Group  2001 
 - 92 p. 
<br/><br/><label>ISBN: </label>9559760505 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water conservation<br/>Soil conservation-economic aspects<br/> Irrigation farmaing-economic aspects<br/>Ecosystems
<br/><br/><label>Dewey Class. No.: </label>333.913  / ANN