- Naresa  Colombo  1978 
 - Sri Lanka National paper 
<br/><br/>http://thakshana.nsf.ac.lk/slstic/NA-247/NA-247.pdf 
 = National workshop on application of science and technology for development 
<br/><br/><label>Standard No.: </label>M 
<br/><br/><label>Standard Tech. Report. No.: </label>
<br/><br/><label>LCCN: </label>B 
<br/><br/><label>Nat. Bib. No.: </label>NA-247 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>NA-247 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science & Engineering
<br/><br/><label>Universal Decimal Class. No.: </label>5/6(548.7)