Active list of permissible explosives and blasting devices approved before July 1, 1970

Author:	Richardson, P. A.
Additional Authors:	Mason, C. M.
Year:	1970
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:8493
Series:	Information circular / United States. Bureau of Mines ;
Report Number:	8493
Subjects:	Explosives--Law and legislation--United States
	Blasting
	Coal mines and mining--Explosives
Link:	https://hdl.handle.net/2027/mdp.39015078514695