Dharmaratne, P.G.R. <br/><br/>
GEM industry of Sri Lanka 

 - Colombo  Geological Survey & Mines Bureau  2005 
 - viii,113p.  24cm 
<br/><br/><label>ISBN: </label>9559370010 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic Geology
<br/><br/><label>Dewey Class. No.: </label>553.8  / DHA