WILLIAMS, Emrys <br/><br/>
Thermionic valve circuits 
/by Emrys Williams 
 - London  Sir isaac pitman  1944 
 - viii, 207 p. 
<br/><br/>  <br/>Includes index 
<br/><br/><label>ISBN: </label>84440 
<br/><br/><label>Dewey Class. No.: </label>621.3815  / WIL