Hughes Arthur Llewelyn <br/><br/>
Photoelectric phenomena 
Hughes Arthur Llewelyn; Du Bridge Lee Alvin 
 -  1932 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>28444 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>C6:45, G2