01250oam 2200361Ka 450 991069646350332120080305141445.0(CKB)5470000002378205(OCoLC)212817700(EXLCZ)99547000000237820520080305d1994 ua 0engtxtrdacontentcrdamediacrrdacarrierTranslucent face partition reduces longwall workers' dust exposure[electronic resource]Washington, DC :Bureau of Mines, U.S. Dept. of the Interior,[1994]2 unnumbered pages digital, PDF fileTechnology news ;no. 430Title from title screen (viewed on Mar. 5, 2008)."March 1994."" ... the principal investigator for this project: John A. Organiscak ... " - p. [2].Longwall miningUnited StatesLongwall miningOrganiscak John A1404136United States.Bureau of Mines.GPOGPOGPOBOOK9910696463503321Translucent face partition reduces longwall workers' dust exposure3485689UNINA