01307nam 2200421 450 991070707800332120180511163728.0(CKB)5470000002460705(OCoLC)1035422707(EXLCZ)99547000000246070520180511d1922 ua 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierDrilling and dustiness of metal-mine air /by D. Harrington[Washington, D.C.] :U.S. Department of the Interior, Bureau of Mines,1922.1 online resource (10 unnumbered pages)Reports of investigations ;2339At head of title: Bureau of Mines -- Department of the Interior.Includes tables."Serial no. 2339.""March, 1922."Mine ventilationMine dustsBoringMine ventilation.Mine dusts.Boring.Harrington D(Daniel),1878-1418884United States.Bureau of Mines,GPOGPOBOOK9910707078003321Drilling and dustiness of metal-mine air3531563UNINA