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Application of large-hole burn cut in room-and-pillar mining / by R.L. Schnidt ...[et al.]

Contributor(s): Schmidt, R. L. (Robert L.) | United States. Bureau of Mines.
Series: United States. Report of investigations: 7994; Report of investigations (United States. Bureau of Mines): 7994Publisher: [Washington] : U.S. Dept. of the Interior, Bureau of Mines, 1975Description: 25 p.Subject(s): Blasting | Mining engineering
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