Tantalum (and Columbium)

Author:	Youngman, E. P.
Year:	1930
Document Type:	USBI
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.11:6328
Series:	Information circular / Bureau of Mines ;
Report Number:	6328
Subjects:	Tantalum
	Niobium
Link:	https://hdl.handle.net/2027/mdp.39015077576364