02033oas 2200661 a 450 991070092210332120210312102420.0(CKB)5470000002413809(OCoLC)753010198(EXLCZ)99547000000241380920110916b20012008 ua engur|||||||||||txtrdacontentcrdamediacrrdacarrierNonmetal mining factsPittsburgh, PA National Institute for Occupational Safety and Health, NIOSH-20111 online resourceDHHS (NIOSH) publicationNonmetal operator mining factsNonmetal operatorsNonmetallic minerals industryUnited StatesEmployeesStatisticsPeriodicalsMinersEmploymentUnited StatesStatisticsPeriodicalsClay industriesUnited StatesEmployeesStatisticsPeriodicalsMine accidentsUnited StatesStatisticsPeriodicalsMine safetyUnited StatesStatisticsPeriodicalsMine accidentsfastMine safetyfastUnited StatesfastPeriodicals.fastStatistics.fastStatistics.lcgftPeriodicals.lcgftNonmetallic minerals industryEmployeesMinersEmploymentClay industriesEmployeesMine accidentsMine safetyMine accidents.Mine safety.National Institute for Occupational Safety and Health.GPOGPOGPOOCLCQOCLCAGPOOCLCOOCLCQOCLCFGILDSOCLCAGPOJOURNAL9910700922103321Nonmetal mining facts3210897UNINA