Permissible explosives tested prior to January 1, 1914

Author:	Hall, Clarence.
Year:	1914
Document Type:	USBM
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.7:71
Series:	Technical paper / United States Department of the Interior, Bureau of Mines ;
Report Number:	71
Subjects:	Coal mines and mining--Explosives
	Explosives
Link:	https://hdl.handle.net/2027/mdp.39015077561101