Abeysinghe, P.B. <br/><br/>
Science Education Series; no23 Limestone Resources of Sri Lanka 

 - Colombo :  NRESA, 
 - ii,60p.;  22cm 
 - Science Education Series  23 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sri Lanka<br/>Science Education
<br/><br/><label>Dewey Class. No.: </label>507  / ABE