International Conference on Residual Gases in Electron Tubes (4th  1971  Florence) <br/><br/>
Residual gases in electron tubes   
ed. by T. A. Giorgi and P. della Porta. 
 - London  Academic Press  1971 
 - xiii, 399p. 
<br/><br/><label>ISBN: </label>0122855507 
<br/><br/><label>Dewey Class. No.: </label>621.3815106  / N72