Bucher, Elmer Eustice,  1885-, <br/><br/>
Vacuum tubes in wireless communication :  A practical text book for operators and experimenters / 
By elmer e. bucher 
 - 202 páginas 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radiotelegrafía
<br/><br/><label>LC Class. No.: </label>TK5865  / B83