Henney, Keith. <br/><br/>
Electron tubes in industry 

 - 2nd ed 
 - New York, London :   McGraw-Hill,   1937. 
 - viii, 539 p. : il. ; 23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>VALVULAS ELECTRONICAS
<br/><br/><label>Universal Decimal Class. No.: </label>XVI-14