Houstoun, R.A.. <br/><br/>
A Treatise on Light /  Textual Documents 
R.A.Houstoun. 
 - 7th ed. / 
 - New York :  Longmans Green & Co ,  1939. 
 - 506p. :  ill ;  22cm . 
<br/><br/><label>Subjects--Index Terms: </label>Light G-Physics 
<br/><br/><label>Dewey Class. No.: </label>535  / H 818 T