Wijayananda, N.P <br/><br/>
The graphite industry in Sri lanka 

 -    1987 
 - 95p., ill.,6s22 cm 
 - Science education No. 24 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology <br/>Miner
<br/><br/><label>Universal Decimal Class. No.: </label>(x)622.336  / WIJ