Loya, Ernest W. <br/><br/>
Gravimetric preparation of primary standard gas mixtures in the parts per trillion range 
by Ernest W. Loya, Charles A. Seitz, and David E. Emerson 
 - [Avondale, Md.]  U.S. Dept. of the Interior, Bureau of Mines  1982 
 - 4 p.  28 cm 
 - Report of investigations / United States Department of The Interior, Bureau of Mines  8643 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Helium--Analysis<br/>Chemistry, Analytic--Quantitative
<br/><br/><label>Dewey Class. No.: </label>622 s