Walker R C <br/><br/>
Photoelectric cell applications 

 - 3rd 
 -  1938 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>27971 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physics
<br/><br/><label>Dewey Class. No.: </label>C6:45-11:9, G8