Hazards in the use of delay-action detonators in coal mines

Author:	Harrington, D.
Additional Authors:	Howell, S. P.
Year:	1929
Document Type:	MAIN
SUDOC:	C 22.11:6147
Series:	Information circular / Bureau of Mines ;
Report Number:	6147
Subjects:	Mine explosions
	Coal mines and mining--Safety measures
Link:	https://hdl.handle.net/2027/mdp.39015095078500