A circuit for firing seismic blasting caps

Author:	Duvall, Wilbur I.
Year:	1950
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:4705
Series:	Report of investigations / Bureau of Mines ;
Report Number:	4705
Subjects:	Explosives
	Blasting
Link:	https://hdl.handle.net/2027/mdp.39015078488155