Eastman, Austin Vitruvius,  1902-1982. <br/><br/>
The four element tube as an audio amplifier, 
by Austin-Vitruvius Eastman ... 
 - Seattle,  The University of Washington,  1930. 
 - 29 p.  diagrs.  23 cm. 
 - Washington (State) University. Engineering Experiment Station. Engineering Experiment Station series. Bulletin  no. 53 .
<br/><br/><label>LCCN: </label>gs 30000123  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radio.
<br/><br/><label>LC Class. No.: </label>TK6565.A55  / E3