01867oam 2200517 450 991070485670332120210311124337.0(CKB)5470000002445168(OCoLC)864025154(EXLCZ)99547000000244516820131125d2011 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierWhat's special about chemical, biological, radiological, and nuclear (CBRN) air-purifying respirators (APR)?Cincinnati, OH :Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health,[2011]1 online resource (7 unnumbered pages) color illustrationNIOSH fact sheetDHHS (NIOSH) publication ;no. 2013-157Title from title screen (viewed on Nov. 25, 2013)."Authors: Richard W. Metzler ... Jonathan V. Szalajda"--Page [5]."September 2013"--Page [6].What's special about chemical, biological, radiological, and nuclear Breathing apparatusBreathing apparatusfastBreathing apparatus.Breathing apparatus.Metzler Richard W.1399842Szalajda Jonathan V.National Institute for Occupational Safety and Health.GPOGPOGPOOCLCFOCLCQINTOCLCAOCLCQBVAGPOBOOK9910704856703321What's special about chemical, biological, radiological, and nuclear (CBRN) air-purifying respirators (APR)3465859UNINA