Beck, A. H. W. <br/><br/>
Thermionic valves :  their theory and design / 
A. H. W. Beck. 
 - Cambridge :   Cambridge university press,   1953. 
 - xvi, 570 p. :  ill. ;  22 cm. 
<br/><br/>Includes bibliographical reference and index. 
<br/><br/>326  326 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electricity.
<br/><br/><label>Dewey Class. No.: </label>621.342 / B388t