Progress in safety in coal mining in the United States

Author:	Harrington, Daniel.
Year:	1934
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:6810
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	6810
Subjects:	Coal trade--United States
	Accidents--Prevention--United States
Link:	https://hdl.handle.net/2027/mdp.39015077568940