Why men were killed at Pennsylvania anthracite mines in 1950

Author:	Forbes, John J. V.
Additional Authors:	Weaver, H. F.
Year:	1951
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7609
Series:	Information circular / United States. Bureau of Mines ;
Report Number:	7609
Subjects:	Coal mines and mining--Pennsylvania
	Mine accidents--Pennsylvania
Link:	https://hdl.handle.net/2027/mdp.39015078456111