Hatchek Paul <br/><br/>
Electron - optics 

 - 2nd 
 - Boston  American photographic publishing co.      1948 
 - 182  cm. 
<br/><br/><label>Standard No.: </label>275,214 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PHYSICS
<br/><br/><label>Dewey Class. No.: </label>C9B5, H8