El Kalreh, A B <br/><br/>
Electron beams, lenses and optics 

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 - New York  Academic Press  1970 
 - 2v.   
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<br/><br/><label>Subjects--Index Terms: </label>lenses and optics  optics and lenses 
<br/><br/><label>Dewey Class. No.: </label>621.3.032.26