BECK, A.H.W. <br/><br/>
Velocity-modulated thermionic tubes 
/A.H.W.Beck 
 - Cambridge  At the University press  1948 
 - 175 p. 
<br/><br/><label>ISBN: </label>84482 
<br/><br/><label>Dewey Class. No.: </label>621.384  / BEC