Making iron powder in the tunnel kiln

Author:	Gottschalk, V. H.
Year:	1948
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7473
Series:	Information circular / Bureau of Mines ;
Report Number:	7473
Subjects:	Tunnel kilns
	Iron, Sponge
Link:	https://hdl.handle.net/2027/mdp.39015078463414