Clay,  <br/><br/>
Practical Exercise in Light 

 - Kottayam  NATIONAL BOOKSTALL  1900 
 - 245 
<br/><br/><label>Subjects--Uniform Titles: </label>--General Stack
<br/><br/><label>Subjects--Topical Terms: </label><br/>Light--Physics--Light & infrared & ultraviolet phenomenaPhysics
<br/><br/><label>Dewey Class. No.: </label>535  / CLA-P