Active list of permissible explosives and blasting devices approved prior to June 30, 1940

Year:	1940
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:3533
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	3533
Subjects:	Explosives--Law and legislation--United States
	Blasting--Equipment and supplies--Law and legislation--United States
	Mining engineering--Equipment supplies--Law and legislation--United States
Link:	https://hdl.handle.net/2027/mdp.39015078492108