Stemming in Metal Mines. Progress Report 3: Relative Advantages and Disadvantages of Different Types of Stemming and No Stemming When Used with 60 Percent Ammonia Gelatin Dynamite at the Mount Weather Testing Adit

Author:	Johnson, John A.
Additional Authors:	Agnew, Wing G.
Year:	1942
Document Type:	N/A
SUDOC:	I 28.23:3612
Series:	United States Bureau of Mines Reports
Report Number:	R. I. 3612
Subjects:	Mine safety.
	Blasting.
Link:	https://digital.library.unt.edu/ark:/67531/metadc38438/