Accident experience iron-ore mines, Lake Superior district, 1940-47

Author:	Cash, Frank E.
Year:	1949
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7510
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	7510
Subjects:	Iron mines and mining--Accidents--Wisconsin
	Iron mines and mining--Accidents--Minnesota
	Iron mines and mining--Accidents--Michigan
Link:	https://hdl.handle.net/2027/mdp.39015077564659