Some information on quarry safety

Author:	Cash, Frank E.
Additional Authors:	Tomlinson, W. H.
Year:	1941
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7144
Series:	Information circular / Bureau of Mines ;
Report Number:	7144
Subjects:	Blasting--Safety measures
	Quarries and quarrying--Safety measures
Link:	https://hdl.handle.net/2027/mdp.39015078534479