Safety in pneumatic drilling and related blasting operations. Opencut mine, Morenci Branch, Phelps Dodge Corp., Morenci, Ariz.,

Author:	Rodriguez, Ernest R.
Additional Authors:	Look, Allen D.
Year:	1956
Document Type:	USBI
SUDOC:	I 28.27:7742
Series:	Information circular / United States. Bureau of Mines ;
Report Number:	7742
Subjects:	Mine safety--Arizona
	Mineral industries--Safety measures
Link:	https://hdl.handle.net/2027/mdp.39015078459479