D. N. Vasudeva <br/><br/>
Textbook of light for B. Sc.students. 
D. N. Vasudeva 
 - ed. Rev ed 7 
 -  Atma Ram  1969 
<br/><br/><label>ISBN: </label> 14 
<br/><br/><label>Dewey Class. No.: </label>535VAS.K9  / 10