Emerson, David E. <br/><br/>
An improved method and apparatus for analysis of impurities in helium 

 - Washington  Bureau of Mines  1970 
 - 10 p.  il  26 cm 
 - RI  7444 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>helium<br/>analysis
<br/><br/><label>Universal Decimal Class. No.: </label>55