De Silva, M. A. T. <br/><br/>
Sri Lanka Science  Technology Indicators 

 - Colombo :  Natural Resources,  1988. 
 - 130p.;  29cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science and Technology
<br/><br/><label>Dewey Class. No.: </label>507.2  / DES