Vakkum Leybold. <br/><br/>
Taschen buch fur laboratories and betrieg /(by) Leybold Vakkum.   
by Leybold Vakkum. 
 -  Verlag, Gott. Heidel  1962 
<br/><br/><label>Dewey Class. No.: </label>621.692  / N62