Some coal-mine safety organizations in the Pennsylvania bituminous field

Author:	Currie, Robert Dewey,
Year:	1931
Document Type:	MAIN
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.11:6414
Series:	Information circular / Bureau of Mines ;
Report Number:	6414
Subjects:	Coal mines and mining--Safety measures
	Bituminous coal--Pennsylvania
	Coal miners--Pennsylvania
Link:	https://hdl.handle.net/2027/mdp.39015095085737