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, by John A. Johnson et al.

Title:	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
Alternate title:	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. (John Albert), 1896-
Author:	Agnew, Wing G.
Note:	U.S. Dept. of the Interior, Bureau of Mines, 1943

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Subject:	Blasting
Subject:	Mine safety
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