National safety competition of 1938

Author:	Adams, William W.
Additional Authors:	Lawrence, T. D.
Year:	1939
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:3459
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	3459
Subjects:	Coal mines and mining--United States
	Coal mine accidents
Link:	https://hdl.handle.net/2027/mdp.39015078490102