Babitzke, Herbert R. <br/><br/>
Study of columbium and tantalum alloys  
Babitzke, Herbert R. 
 - Washington  Bureau of mines  1968 
 - Report Investigation  7116 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>niobio<br/>tántalo
<br/><br/><label>Universal Decimal Class. No.: </label>661.888.3+661.888.2 (47)