Beck, A. H. W.  1916- <br/><br/>
Thermionic valves :  their theory and design / 
A. H. W. Beck, 
 - Cambridge [Eng.] :  University Press,  c1953. 
 - xvi, 570 p. :  illus. ;  21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Vacuum-tubes.
<br/><br/><label>Dewey Class. No.: </label>621.384132  / BET 1953