Thenabadu, Marvyn W. <br/><br/>
Science Education Series No-28 : Soil and Soil Conservation in Sri Lanka 

 - Sri Lanka,  Natural Resources Energy & Science Authority,  1988, 
 - 113p.  23cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Soil and Soil Conservation in Sri Lanka<br/>Science Education Series