Hafnium

Author:	Tyler, Paul M.
Year:	1931
Document Type:	USBI
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.11:6457
Series:	Information circular / Bureau of Mines ;
Report Number:	6457
Subject:	Hafnium
Links:	https://hdl.handle.net/2027/mdp.39015074127518
	https://hdl.handle.net/2027/mdp.39015095085885