Field test for columbium

Author:	McVay, Thomas Newkirk.
Additional Authors:	Smelley, Annie G.
Year:	1962
Document Type:	BMRA
Issuing Agency:	Bureau of Mines,
SUDOC:	I 28.23:5898
Series:	Report of investigations / Bureau of Mines ;
Report Number:	5898
Subjects:	Niobium
	Columbium
Link:	https://hdl.handle.net/2027/mdp.39015078481168