Extreme Multiple Seam Mining In The Central Appalachian Coalfields
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Extreme Multiple Seam Mining In The Central Appalachian Coalfields

  • 2007

  • Source: Proceedings: New Technology for Ground Control in Multiple-Seam Mining. Mark C; Tuchman RJ, eds., Pittsburgh, PA: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, 2007 May; :55-61
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