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 .
 - Report of investigations (United States. Bureau of Mines) ;  8643. .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>LCCN: </label>81607160  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Helium--Analysis.<br/>Chemistry, Analytic--Quantitative.
<br/><br/><label>LC Class. No.: </label>TN23  QD181.H4  / .U43 no. 8643 
<br/><br/><label>Dewey Class. No.: </label>622 s  546/.75165 
<br/><br/><label>Gov. Doc. Class. No.: </label>I.28.23:8643