Active list of permissible explosives and blasting devices approved before December 31, 1972 :supercedes Information Circular 8493

Author:	Ribovich, John.
Additional Authors:	Watson, Richard W.
Year:	1973
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:8597
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	8597
Subjects:	Explosives--Law and legislation--United States
	Blasting
	Coal mines and mining--Explosives
Link:	https://hdl.handle.net/2027/mdp.39015078516310