Tharumaratnam, Vythilingam <br/><br/>
A 21st century energy source for Sri Lanka, ground source energy systems 

 - 1st ed.; 
 - London :  Business Marketing International Ltd,  1995. 
 - 71p.;  ill.;  21cm 
<br/><br/><label>ISBN: </label>0952551713 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Land Economics<br/>Economics
<br/><br/><label>Dewey Class. No.: </label>333.79  / THA