Markus, John. <br/><br/>
Handbook of Industrial Electronic Circuits 

 - New York :   McGraw-Hill,   1948. 
 - p. 272 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ELECTROTECNIA<br/>CIRCUITOS ELECTRONICOS<br/>CONTROL<br/>AUDIO
<br/><br/><label>Universal Decimal Class. No.: </label>621.38 [035]