Stemming in metal mines :progress report 6 : relative advantages and disadvantages of different types of stemming and no stemming when used with 40 percent ammonia gelatin dynamite at the Mount Weather testing adit

Author: Johnson, John A.
Additional Authors: Agnew, Wing G.
Year: 1943
Document Type: BMRA
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.23:3693
Series: Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number: 3693
Subjects: Mine safety
Blasting
Link: https://hdl.handle.net/2027/mdp.39015078496497

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