Safety analysis of United States shaft-sinking operations

Year:	1977
Document Type:	MAIN
Issuing Agency:	Dames & Moore,
Series:	[Open-file report] - U.S. Bureau of Mines ;
Report Number:	1978-45
Subjects:	Mine safety
	Shaft sinking--Safety measures
Link:	https://hdl.handle.net/2027/mdp.39015095081785