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Date: 2012-06-12 11:38:01Safety engineering Sago Mine disaster Upshur County West Virginia Mine Safety and Health Act Coal mining Mining engineering National Institute for Occupational Safety and Health Mine rescue Mine Safety and Health Administration Mining Safety Occupational safety and health | Add to Reading ListSource URL: www.msha.govDownload Document from Source WebsiteFile Size: 117,87 KBShare Document on Facebook |