Beck, A. H. W.  1916- <br/><br/>
Velocity-modulated thermionic tubes / 
A. H. W. Beck 
 - Cambridge :  University Press,  c1948 
 - x, 180 p. :  ill. ;  22 cm. 
 - Modern radio technique .
<br/><br/>Includes Bibliography and Index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Vacuum-tubes.
<br/><br/><label>Dewey Class. No.: </label>621.384  / BEV 1948