Fleming, J.A.. <br/><br/>
The Thermionic Valve: and its Developments in Radiotelegraphy and Telephony /  Textual Documents 
J.A.Fleming. 
 - 1st ed. / 
 - New York :  The Wireless Press, Ltd. ,  1919. 
 - 277p. :  ill ;  22cm . 
<br/><br/><label>Subjects--Index Terms: </label>Radiotelegraphy-Thermionic Valve G-Physics 
<br/><br/><label>Dewey Class. No.: </label>537.53  / F 629 T