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Design practices for multiple-seam longwall mines

Published: Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 1993
Format: Microform, Microfiche
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Cover images provided by Open Library

Update on ventilation for longwall mine dust control

Published: Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 1993
Format: Microform, Microfiche
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