Bell,R.L. <br/><br/>
Negative Electron Affinity Devices 

 - Oxford:  Clarendon Press,  1973. 
 - 148p.;  23 cm 
<br/><br/><label>ISBN: </label>0-19-859313-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering
<br/><br/><label>Dewey Class. No.: </label>621.381  / BEL