01309oam 2200397 a 450 991070055430332120110728104209.0(CKB)5470000002410454(OCoLC)743216838(EXLCZ)99547000000241045420110728d2011 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierSuitable hard hats[electronic resource][Arlington, Va.] :[U.S. Dept. of Labor, Mine Safety and Health Administration],[2011]1 online resource (3 pages)Program information bulletin ;no. P11-36Title from title screen (viewed on July 26, 2011)."Issue date 5/10/2011."Mine safetyUnited StatesMines and mineral resourcesUnited StatesEquipment and suppliesSafety hatsUnited StatesMine safetyMines and mineral resourcesEquipment and supplies.Safety hatsUnited States.Mine Safety and Health Administration.GPOGPOGPOBOOK9910700554303321Suitable hard hats3190279UNINA