The National safety competition of 1930

Author:	Adams, William W.
Year:	1931
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.12:3126
Series:	Report of investigations / United States Department of Commerce, Bureau of Mines ;
Report Number:	3126
Subjects:	Mine safety
	Coal mines and mining--United States
	Coal mine accidents
Link:	https://hdl.handle.net/2027/mdp.39015077567488