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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 by Johnson, John A. 1896- is a book available to read on EtoBox.

Author
Johnson, John A. 1896-
Publisher
U.S. Dept. of the Interior, Bureau of Mines, 1943.
Published
1943
Language
EN

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