G.C,E. Advance level Physics grade 12 unit 04-Thermal physics 

 - 2nd Ed. 
 - Maharagama :  National Institute of Education,   2022. 
 - 84 p. 
<br/><br/><label>ISBN: </label>9789556548990 
<br/><br/><label>Dewey Class. No.: </label>530  / PHY