Active list of permissible explosives and blasting devices approved before February 28, 1961

Author:	Hanna, N. E.
Year:	1962
Document Type:	USBI
Issuing Agency:	United States Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:8087
Series:	Information circular / Bureau of Mines ;
Report Number:	8087
Subjects:	Coal mines and mining--Explosives
	Explosives--United States
	Blasting--United States
Link:	https://hdl.handle.net/2027/mdp.39015078534875