Some safety records in Illinois coal mines

Author:	Miller, A. U.
Year:	1931
Document Type:	MAIN
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.11:6417
Series:	Information circular / Bureau of Mines ;
Report Number:	6417
Subjects:	Coal mines and mining--Illinois
	Mine safety--Illinois
Link:	https://hdl.handle.net/2027/mdp.39015095085745