Official changes in the active list of permissible explosives and blasting devices for August, 1931

Author:	Turner, Scott.
Year:	1931
Document Type:	BMRA
Issuing Agency:	United States Bureau of Mines,
SUDOC:	C 22.12:3140
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	3140
Subjects:	Coal mines and mining--Safety measures
	Explosives
Link:	https://hdl.handle.net/2027/mdp.39015077567835