Trees and forests in the upper Mahaweli catchment 

 -  Mahaweli authority  1998 
 - 27p., ill.,  24 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photo of Polgolla barrage <br/>Soil erosion <br/>Forest hydrology <br/>Map of Mahaweli catchment
<br/><br/><label>Universal Decimal Class. No.: </label>581  / FIN