Sethi, N K . <br/><br/>
Text-Book of Optics /  Textual Documents 
N K Sethi,S B Raizada. 
 - 3rd ed / 
 - Delhi :  Premier Publishing Co. ,  1957. 
 - 494 p :  ill ;  23 cm . 
<br/><br/><label>ISBN: </label> HB 
<br/><br/><label>Subjects--Index Terms: </label>Physics T/G-Pysics 
<br/><br/><label>Dewey Class. No.: </label>535  / Sc 75 T