01352oas 2200409 450 991071530480332120210316121047.0(CKB)5470000002510991(OCoLC)1241254030(EXLCZ)99547000000251099120210312b20032003 ua engur|||||||||||txtrdacontentcrdamediacrrdacarrierUnderground mining facts[Pittsburgh, Pa.] :National Institute for Occupational Safety and Health,2005.1 online resource (1 volume)DHHS (NIOSH) publicationMineral industriesUnited StatesEmployeesStatisticsPeriodicalsMinersEmploymentUnited StatesStatisticsPeriodicalsMine accidentsUnited StatesStatisticsPeriodicalsMine safetyUnited StatesStatisticsPeriodicalsStatistics.lcgftMineral industriesEmployeesMinersEmploymentMine accidentsMine safetyNational Institute for Occupational Safety and Health,GPOGPOGPOJOURNAL9910715304803321Underground mining facts3303782UNINA