Minhaj-ud -Din <br/><br/>
A Text Book Of Light 

 - Lahor  Qaumi Kutub Khana   1946 
 - 232  pages 
<br/><br/> Pl mean Physics Light, Heat and Sound Page 465-469 in A-Z Register (Acc. No. Pl1-Pl133) 
<br/><br/><label>Dewey Class. No.: </label>PL132