R.M.C.T. Rathnayaka <br/><br/>
විද්‍යාව - 7    science  

 - Saranga publisher  Nuwara  2016 
 - 264p  1 
 - 2023-11-28 
<br/><br/><label>ISBN: </label>978-955-684-301-9 
<br/><br/><label>Nat. Bib. No.: </label>0006949 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>RAT 
<br/><br/><label>Universal Decimal Class. No.: </label>500