ANNELL, C. S. <br/><br/>
A constant-feed direct-Current Arc / 
by C. S. Annell and A. W. Helz. 
 -- Washington :   United States Government Printing Office,   1961 
 - P. 231-251. -- 
 (Geological Survey Bulletin  ;  1084-J).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geoquímica
<br/><br/><label>Universal Decimal Class. No.: </label>550.4