01920oas 2200637 a 450 991070118930332120210312102747.0(CKB)5470000002415151(OCoLC)758392562(EXLCZ)99547000000241515120111024b20012008 ua engur|||||||||||txtrdacontentcrdamediacrrdacarrierNoncoal contractor mining factsPittsburgh, PA National Institute for Occupational Safety and Health-20111 online resourceDHHS (NIOSH) publicationNoncoal contractorsNon-coal contractor mining factsMinersEmploymentUnited StatesStatisticsPeriodicalsContractors' operationsUnited StatesStatisticsPeriodicalsMine accidentsUnited StatesStatisticsPeriodicalsMine safetyUnited StatesStatisticsPeriodicalsContractors' operationsfastMine accidentsfastMine safetyfastUnited StatesfastPeriodicals.fastStatistics.fastStatistics.lcgftMinersEmploymentContractors' operationsMine accidentsMine safetyContractors' operations.Mine accidents.Mine safety.National Institute for Occupational Safety and Health.GPOGPOOCLCQOCLCAGPOOCLCOOCLCQOCLCFGILDSOCLCAGPOJOURNAL9910701189303321Noncoal contractor mining facts3132131UNINA