Premadasa, Alavaththagoda <br/><br/>
භෞතික පරිසරය 
 Bhauthika parisaraya 

 - Colombo  Godage   2001 
 - 216p.,  22 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology <br/>Energy
<br/><br/><label>Universal Decimal Class. No.: </label>581  / PRE